session_trace_stop

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

No annotations are provided, so the description carries the full behavioral burden, yet it only restates the action. It does not say what happens to the captured trace data, whether the stop is idempotent, whether the session itself remains active (vs. session_stop), or whether the trace must later be exported with session_trace_export.

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?

A single front-loaded sentence with no filler. It is economical, though arguably too terse for a tool whose behavior is not self-evident from the name alone.

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?

An output schema exists, so return values need not be explained, but the description still omits everything an agent needs beyond the name: trace-data fate, idempotency, session-vs-trace scope, and the relationship to the other session_trace_* and session_stop siblings.

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% and the single session_id parameter is undocumented in both schema and description. The description adds no meaning about which session's trace is stopped or what happens if the id is invalid. With one undocumented parameter, the description should compensate but does not.

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 gives a specific verb and resource: 'Stop recording session action trace.' An agent can tell this is the termination counterpart to session_trace_start. However, it never explicitly names or differentiates itself from siblings like session_trace_get, session_trace_export, or session_stop, so it stops short of a 5.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives. The lifecycle implied by the name (stop a trace previously started) is left entirely to inference, and the crucial question of how this differs from session_stop is not addressed.

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