sessions_summary

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

With no annotations, the description carries the behavioral disclosure burden. It usefully reveals that the result is scoped to sessions the agent joined and is a quick high-level overview, but it does not describe the returned summary's structure, limitations, or behavior when no active sessions exist.

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 compact and front-loaded with the core action, then provides a clearly labeled trigger list and a parameter explanation. Every sentence contributes useful guidance without repetition.

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 one-parameter, read-only summary tool without an output schema, the description gives enough trigger context, parameter semantics, and scope to let an agent invoke it correctly. It could be more specific about the summary content, but the low complexity makes the current description largely sufficient.

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 description coverage is 0%, so the description must compensate. The sentence 'Your agent ID (summary is scoped to sessions you joined)' adds meaning beyond the raw schema by explaining what agent_id is used for and how it affects the result.

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 uses a specific verb and object: 'Get a summary of all active sessions' and adds 'Quick overview of ongoing work,' so an agent can tell it is a lightweight read-only overview. However, it does not differentiate from sibling tools like list_sessions, get_agent_sessions, or session_statistics, which could serve similar purposes.

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 provides explicit 'AUTOMATIC TRIGGERS' with concrete scenarios, such as when a user asks what sessions are active or before joining a new session. It lacks when-not-to-use guidance or named alternatives, so it stops short of a 5.

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