list_recent_sessions

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Without annotations, the description fully discloses the tool's read-only nature, default behavior, and the fields it returns. It also mentions the configurable log root, providing complete behavioral context.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is well-structured and front-loaded with the core purpose. While efficient, a slight rephrasing could reduce redundancy (e.g., 'newest first' repeated), but it remains clear and concise overall.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple list tool with an existing output schema, the description covers all necessary aspects: purpose, behavior, parameters, and read-only guarantee. It is complete and leaves no ambiguity.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description adds substantial meaning beyond the schema (which has 0% description coverage). It explains the repo parameter's filtering behavior and the limit parameter's default and maximum value, making the parameters clear.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool lists recent coding-agent sessions, newest first, with specific details on log root, limit, and fields returned. It distinguishes itself from siblings (summarize_tool_calls and tail_agent_log) by its unique purpose.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explains when to use the tool (to list recent sessions) and notes it is read-only. However, it does not explicitly mention when not to use it or provide alternatives, though the sibling tools are sufficiently distinct.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.