# NousResearch/hermes-agent · MCP read-only hint trust tier approval behavior

## Open now

- Nothing open on GitHub.

These items relate to how read-only hints (readOnlyHint/snake_case variants) are recognized for MCP tools on untrusted servers, affecting whether approval prompts are required. The work involves a bug report and related fix attempts around MCP 2.x compatibility with this hint.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #133532. Verify it addresses your case.
- **Recommended:** read PR #133532 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.67`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Closed / duplicate issues

- #121042: MCP trust tier can't see readOnlyHint with mcp 2.0.0 — every tool on a trust: untrusted server requires approval

## Prior & competing PRs

- **#133532: MCP read-only tools on untrusted servers stop asking for approval under mcp 2.x (salvage #111270)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `contributors/emails/[redacted:email]`, `tests/e2e/core/mcp_plugins/test_mcp_stdio_conformance.py`, `tests/tools/test_mcp_trust_gating.py`, `tools/mcp_tool_registration.py`
- **#121044: fix(mcp): honor snake case read-only hints**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `4b6884aaa7`, `#133532`, `#111270`, `#88372`

## Fix status

- Merged to main in PR #133532 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-10-05`.