Files
PaperClipAI/maps/agent-access-map
DottaandPaperclip 370fb50ad4 fix(mcp): keep sibling tools available after transient calls (#16890)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work.
> - Agents use remote MCP tools through a governed gateway.
> - The gateway lists tools only while their shared connection is
healthy.
> - One failed call currently marks the whole connection as unhealthy.
> - Later calls to healthy sibling tools then fail with
`tool_not_found`.
> - This pull request keeps non-authentication call failures on their
invocation.
> - Agents can continue their work while credential and access gates
remain in force.

## Linked Issues or Issue Description

Refs #10147.

Related work: #15462 fixed oversized and malformed response handling.
#15448 covers timeout and JSON-RPC health handling together with
separate SSE and catalog discovery changes. Its patch still marks fetch
failures and HTTP failures as connection errors. #15325 proposed a
transport failure counter; it has merge conflicts and has not changed
since October 6. #11910 is an older timeout fix with merge conflicts.
This PR covers the remaining fetch and HTTP failure paths on current
master, with the same narrow call-health rule for timeouts and JSON-RPC
failures. It does not include the SSE or discovery changes from #15448.
The timeout session-reset check follows the recovery case discussed in
#15448.

**What happened?**

A shared remote MCP connection works until one call has a network
failure, timeout, HTTP 503, or JSON-RPC error. Every later call on that
connection returns `tool_not_found`, including healthy sibling tools.
Connection setup then asks for user attention even though the failure
did not prove that credentials need repair.

**Expected behavior**

The original invocation retains its failure. Authorized sibling tools
remain callable. The gateway does not replay an ambiguous action. HTTP
401/403, missing credentials, and explicit insufficient scope keep their
access gates.

**Steps to reproduce**

1. Give an agent access to two read tools on one remote MCP connection.
2. Make one tool fail with a network error or HTTP 503.
3. Call the other tool in the same gateway session.
4. Before this fix, the second call fails with `tool_not_found` before
provider dispatch.

**Paperclip version or commit**

`master` at `e6dcd1e8e9`. The regression runs against source with
synthetic data.

**Deployment mode**

Any deployment that uses a shared remote MCP connection. This is a core
gateway issue.

## What Changed

- Preserve connection health after a network failure, timeout,
non-authentication HTTP error, or JSON-RPC error from one tool call.
- Retain HTTP 401/403 and insufficient-scope health gates.
- Retain HTTP 401/403 gates during MCP initialization and its
initialized notification, with HTTP 503 controls for both stages.
- Discard only the upstream session used by a network failure or
timeout. Let the next explicit call initialize again.
- Add sibling-tool regression cases, authentication controls, and real
HTTP header/body timeout checks.
- Update runtime recovery guidance and the feature and access maps.

## Verification

- Red: the four new sibling-tool cases failed on the original
implementation. Each second call returned HTTP 404 with
`tool_not_found`. HTTP 401/403 control cases passed.
- Green: the same six-case selection passed after the production change:
`pnpm --filter @paperclipai/server exec vitest run
src/__tests__/tool-gateway-service.test.ts -t 'keeps sibling MCP tools
usable|keeps the connection blocked' --maxWorkers=1`.
- The regression checks the actual gateway and embedded PostgreSQL. The
injected provider fault preserves the call boundary. It checks failure
recording, no automatic replay, catalog retention, and successful
sibling dispatch.
- The real local HTTP fixture checks cancellation before headers and
during a body, then a successful explicit call with a fresh MCP session.
- `node scripts/check-maps.mjs` and `git diff --check` pass.
- Complete nearby suites pass: 166 tests across
`tool-gateway-service.test.ts`, `tool-gateway.test.ts`,
`remote-mcp-protocol.test.ts`, and `mcp-http.test.ts`, with one test
worker.
- `pnpm --filter @paperclipai/server exec tsc --noEmit` passes after
refreshing Runner TypeScript declarations. The first package typecheck
used declarations from before the rebase and failed two unchanged
native-session call sites; rebuilding that dependency resolved both
errors.
- The rebased head also passes all 11 selected
sibling/authentication/session regressions.
- Review regression red: setup-stage HTTP 401/403 controls failed
because connection health stayed `ok`; the two setup-stage HTTP 503
controls passed. Green: all six setup controls and the complete 166-test
nearby run pass. The fix separately handles typed initialization
authentication failures and preserves the existing caller error. The
server compiler also passes after this change.
- Full repository CI passes on
`256a65ccc302c1c31a80e87f1f91411d955028de`: typecheck, build, test
shards, Runner checks, browser checks, Canary dry run, and aggregate
gates. All checks are terminal: 55 successful, 2 expected skips, and the
separate Paperclip Review check is neutral. Greptile is 5/5 on this
exact head, with no open findings.
- Full repository checks were run in CI. Local verification in this
worktree used the focused suites and server compiler to keep parallel
work bounded.
- This change has no live provider or staging deployment proof.

## Risks

- A provider that remains unavailable can stay listed until a health
check detects the outage. Each call still fails with its original
controlled reason code.
- No automatic retry occurs because a failed remote action may already
have run.
- Already unhealthy connections still need a successful health check
after an upgrade.
- No schema, credential policy, or permission contract changes.

## Model Used

- OpenAI Codex, GPT-6 family, with tool use and code execution. The
runtime does not expose the exact serving model ID or context window.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>
2026-10-19 16:11:15 -05:00
..

Paperclip agent access map

This map accompanies the feature map. It records APIs, agent entry points, permission boundaries and verification for the same capability IDs. The shared contract defines the format and maintenance rules.

Browse access contracts

The same-named feature recipes define navigation and capability IDs. Run node scripts/storybook-catalog.mjs for the generated maps/generated/agent-access-map.md index, or browse the published feature guide. Add or update the affected companion; there is no central registration or count.

Existing baseline source references describe the original inspection, not current verification. Record new executed evidence in the PR, issue, or CI artifact with its revision and scope. Do not refresh unrelated headers as bookkeeping.

Using an entry

Read its Policy and Gaps before selecting an agent path. Native fallback, legacy REST/CLI, stdio MCP and a personal assistant connection can have different authority and availability. Use a real admitted production binding; a scenario declaration is not an installed tool. A restricted entry records current enforcement and leaves any unresolved delegation decision visible.

For API catalog disagreements, follow the route/service authorization and record discovery drift. For not-applicable, retain the concrete exception and local path. Split shared business operations from client-only presentation.

Use maintain-verification-skill to reconcile changed source and both maps. Use verify-paperclip and existing API/runner/MCP fixtures to collect the permitted-agent and denial evidence; report blocked/not-run coverage honestly. Run node scripts/check-maps.mjs after editing. The structural check does not certify permissions, API catalog coverage, tool admission or live behavior.

Native REST transport

The call_api parity change reconciles affected baselines against 58e16dbddfc9c8d0cf60867f9d9847f0feda055b and the changes in this PR. Ordinary REST operations use the same route authorization as legacy agent REST. Dedicated tools remain optional for those operations; protocol endpoints still need their existing clients. Board-only routes remain restricted for agent identity.

Native search_api / call_api requires operator rollout admission, a running authorized native run, current task assignment and execution-run binding, company and budget authority, task privacy, and a permitted work mode. Ask and Plan retain mutation restrictions, and runs retain their admitted JWT scope during restart recovery even when task mode changes. A waiting agent does not gain independent native control just because a REST route exists.

Credential-bearing replies, including company exports and their legacy alias, stay inline under a 10 MiB limit and use encrypted mutation receipts. Other saved API snapshots are limited to the issuing actor and responsible user, plus authorized administrators. Artifact uploads enforce the same access checks as downloads; private snapshots are excluded from company exports and public company logos. Explicit deliverables use the existing sharing path. Native event history, checkpoints and completion records omit API bodies while preserving receipt metadata and replay digests. Restored webhook secrets use the same encrypted receipt and inline response policy as newly created webhook secrets. Task image access requires the company boundary and the task permission; skill-test and low-trust agents do not need company-wide browsing authority. Completion replay applies the same idempotent projection to stored and expected payloads; the run-log guide describes its fields.

Sources: API client, catalog, native authority, credential storage classification, snapshot access, and history redaction. The affected entries remain baseline and source-only; this reconciliation does not certify every operation. Targeted real-route proof lives in the API integration suite, including owned routines, skill tests, scoped secrets, proposals and private export replay.