agent_sessions

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

With no annotations, the description carries the full burden, but it only mentions the day scoping. It does not explain what 'sessions seen' means, how a local calendar day is interpreted (e.g., timezone), or what the response contains. This is minimal behavioral disclosure.

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 a single sentence with no unnecessary words, making it concise and easy to parse. It is slightly under-specified but not padded, so it earns a high score for structure.

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?

Although the tool is simple with one optional parameter, the description omits critical context such as the output structure (even though an output schema exists, the description should clarify what sessions are listed), the meaning of 'seen', and how 'local calendar day' is determined. This is incomplete for an agent deciding to invoke it.

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 for the undocumented 'day' parameter. It mentions 'local calendar day' but does not specify the day's format, accepted values, or the meaning of null default, leaving the parameter ambiguous.

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 states that the tool shows Claude/Grok sessions seen during a local calendar day, which conveys the resource (sessions) and scope (a day). However, the verb 'seen' is vague and does not explicitly say 'list' or 'retrieve', and it does not distinguish this from sibling tools like day_recap.

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?

No guidance is given about when to use this tool versus alternatives like active_now or what_was_i_doing. It neither mentions appropriate conditions nor provides exclusions, so an agent has no basis for choosing it over siblings.

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