sessiongrep has well-structured tool definitions with clear naming (verb_noun pattern: search_sessions, get_session, list_sessions, timeline_for_repo, get_resume_command). All 5 tools have descriptions (avg ~150 chars, within 10-1024 baseline). Input schemas are present with proper JSON Schema structure, types, and enums. However, parameter descriptions are sparse or missing in several tools (e.g., max_lines in get_session lacks guidance on typical values; limit parameters lack min/max bounds). Output schemas are not documented, LLMs cannot predict response structure. Error handling is minimal; no recovery guidance or actionable error messages visible in code. All tools are read-only (good for safety), but no tool annotations (readOnlyHint) are declared. Parameter naming is consistent but could be more explicit (e.g., 'limit' vs 'max_results').

• Document output schemas for all 5 tools. Example: search_sessions returns {sessions: [{id, provider, path, updated_at, snippet}], total_count}. Include field types and descriptions.
• Add min/max bounds to numeric parameters: limit (1 - 200), max_lines (1 - 10000). Update descriptions: 'Max results to return (1 - 200, default 10)' instead of just 'Max results to return'.
• Declare tool annotations in MCP registration: readOnlyHint=true and idempotentHint=true for all 5 tools. Helps LLMs reason about retry safety.
• Add recovery guidance to error cases. E.g., get_session description: 'If session not found, try search_sessions() with keywords from the session context.'
• Clarify pagination: if search_sessions/list_sessions support offset/cursor, add those parameters and document total_count in response. If not, state 'Returns up to N most recent results; no pagination available.'