ruyi_trace_stop

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

With no annotations provided, the description carries full responsibility for behavioral transparency. It discloses that the tool stops tracing and returns a summary/data, but it omits important details such as side effects (e.g., whether traces are cleared), error handling, or requirements like an active trace session. This is a minimal disclosure that leaves significant gaps.

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, concise sentence that directly conveys the core function without unnecessary words. It is well-structured and front-loaded, though it could add a brief note about the parameter or prerequisites without losing conciseness.

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?

The tool has a simple signature (one optional parameter) but lacks annotations, output schema, and parameter descriptions. The description covers the basic purpose but does not explain the pageIdx parameter, clarify the relationship to ruyi_trace_get_results, or address edge cases. This is insufficient for an agent to use the tool confidently in varied contexts.

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 input schema defines a single optional parameter 'pageIdx' with no description (0% schema coverage). The tool description also omits any explanation of this parameter, leaving the agent unable to infer what value to provide or how it affects the stop operation. The description must compensate in this case but fails to do so.

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 a specific action ('stop BiDi tracing') and its result ('return summary and data'). This distinguishes it from sibling tools like ruyi_trace_start (which starts tracing) and ruyi_trace_get_results (which likely retrieves results while tracing is active).

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 implies that the tool is used to end an ongoing tracing session and retrieve results, but it does not explicitly state when to use it versus ruyi_trace_get_results, nor does it mention prerequisites or behavior if no trace is active. Usage context is implied but not fully specified.

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