# NousResearch/hermes-agent · MCP tool schema and argument passing fixes

## Open now

- Nothing open on GitHub.

These issues and PRs address a chain of bugs where MCP tools published empty schemas instead of real parameter definitions, and where arguments were not correctly passed through to hermes-tools. The work spans schema registration, Python signature generation, and kwargs envelope unwrapping.

## 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 #64580. Verify it addresses your case.
- **Recommended:** read PR #64580 (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: `resolved` · deciding PR(s): `pr-64580`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #64025: hermes_tools_mcp_server: params_schema never passed to add_tool() — all MCP tools publish an empty **kwargs schema and drop their arguments

## Prior & competing PRs

- **#64580: fix(mcp): publish real tool schemas from the hermes-tools MCP server (#64025)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/transports/hermes_tools_mcp_server.py`, `tests/agent/transports/test_hermes_tools_mcp_server.py`
- **#64034: fix(mcp): pass params_schema to MCP tools via Python signatures**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `#64580`

## Fix status

- Merged to main in PR #64580 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-07-15`.