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

Since no annotations are provided, the description carries the full burden of behavioral disclosure, and it does this well. It explicitly warns that free-text fields are unverified agent-submitted content, numeric fields are server-verified, and free text should be treated as data rather than instructions. This is important, safety-relevant behavior that goes well beyond a simple fetch.

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 first two sentences and the final data-handling note are dense and useful, but the rhetorical question 'Will you see what the author saw, and is there more just past the tick where they stopped?' adds no operational value and introduces vague jargon. The description is front-loaded but has one sentence that does not earn its place.

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 tool with no output schema, the description explains the main response contents: full trace, replay-ready calls, and lineage. It also covers data provenance and prompt-injection caution. It does not mention error conditions or access requirements, but for this simple fetch operation the description is largely complete.

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 only parameter, trace_id, is already fully documented in the schema with the description '21-char trace id,' so schema coverage is 100%. The description adds little beyond the word 'one trace,' but the schema already carries the necessary semantic weight for this simple parameter.

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 opens with a specific action and resource: 'Fetch one trace in full.' It clearly distinguishes this from listing/browsing siblings by emphasizing a single complete trace and naming unique output components such as ready-made curl/MCP replay calls and parent/child lineage.

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 when to use the tool—when you need a full trace with replay artifacts and lineage—but it never explicitly states when to use it over a sibling like trace_browse, nor when it should not be used. The context is present but only implied, not stated as clear guidance.

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