* fix(mcp): accept reserved _meta field in tools/call params
The memory MCP server rejected any tools/call whose params contained a key
other than name/arguments, returning -32602 "Unknown or missing memory tool."
MCP clients (e.g. Claude Code) attach the spec-reserved `_meta` field
(such as progressToken) to request params, so every tool call from a
compliant client failed and the entire memory MCP surface was unreachable —
even though initialize/tools-list and the `ecc memory` CLI kept working.
Per the MCP base protocol, `_meta` is reserved for request metadata and
must be accepted. Add it to the params key allowlist.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* test(mcp): validate _meta shape and cover tools/call param allowlist
Address CodeRabbit review on #2670:
- Validate params._meta when present: accept metadata objects, reject null,
arrays, and scalar values (reuses isRecord). Keeps _meta optional and
preserves existing name/arguments/unexpected-key rejection.
- Add regression tests: accept _meta with progressToken, reject malformed
_meta values, and continue rejecting unrelated top-level params.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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