get_stats_overview

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

With no annotations, description partially carries behavioral burden: mentions default text output. But does not disclose read-only nature, side effects, or error behaviors. Adequate but not comprehensive.

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?

Single sentence, front-loaded with purpose, no wasted words. Efficient and clear.

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?

Lacks output schema and does not detail return structure besides listing three aspects. No mention of limits or pagination. Adequate for a simple tool but leaves uncertainty about exact response format.

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?

Schema covers both parameters with descriptions (100% coverage). Description adds little beyond noting default format, which is already evident from enum. Baseline 3 is appropriate.

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?

Description clearly states it returns statistical overview (message counts, active members, time distribution). Differentiates by focusing on session stats, though not explicitly distinguishing from sibling tools like get_time_stats.

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?

Implied usage for obtaining session stats, but no explicit guidance on when to use this over alternatives. Notes default format and option for JSON, but lacks exclusions or context.

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