Read GPU Trace timeline event details

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

Annotations already declare readOnlyHint=true and idempotentHint=true, covering safety. The description adds useful behavioral context by disclosing that 'Embedded byte arrays are represented by byte length, not dumped.' This clarifies a potential data-format surprise, but no other behavioral traits (e.g., error behavior, performance) are disclosed.

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 two sentences, each earning its place. The first sentence lists the return content comprehensively; the second clarifies a critical edge case about byte array representation. No redundant or vague wording.

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?

There is no output schema, but the description thoroughly describes the returned object's contents and handles a common gotcha (byte arrays). It does not mention error scenarios or how to obtain event_id (though that is covered by schema). Overall, the description is complete for a getter tool of moderate complexity.

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 100%, with both parameters already described in detail (event_id pattern and report_id format). The description adds no parameter-specific meaning beyond what the schema provides, so the baseline 3 is appropriate.

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 it 'Return[s] one decoded GPU Trace command-stream call' and enumerates the specific contents returned: full typed arguments, return value, object handles, timestamp boundaries, pipeline stages, and HES correlation ids. This is a specific verb+resource that distinguishes it from sibling tools like list_gpu_trace_timeline_events.

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 usage for fetching a single decoded timeline event but does not explicitly state when to use it vs. alternatives. It does not mention that event_id comes from list_gpu_trace_timeline_events; that relationship only appears in the schema. No when-not or alternative guidance is given.

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