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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is covered. The description adds meaningful behavioral context beyond the schema: it explains that scriptRunId behaves like a played run, that the cycle names a scriptId for cross-reading, and how the detail connects to incident cycle references. It doesn't disclose things like pagination or response shape, but there is no output schema and the key relational traits are well described; a 4 is warranted given the strong context added.

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 three sentences and front-loads the primary purpose ('Get one Cycle in full') before moving to related-tool routing. Every sentence adds either outcome detail or cross-tool guidance, and it avoids fluff. The only structural weakness is that it's a dense run-on sentence in the middle, but it remains readable and efficient.

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 read-only two-parameter detail tool with annotations covering safety, the description is nearly complete: it names the fields returned, explains cycleId provenance, and routes to sibling tools for deeper drill-down. It doesn't specify the exact output shape or mention what happens when a cycle is missing or in progress, and there is no output schema, but the essential usage context for an agent is present. A 4 reflects that it's strong but not exhaustive.

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 schema already documents cycleId with the same source note ('as reported by list_monitor_cycles or an Incident's cycle references'), so the description's one parameter detail is redundant. projectId has no schema description and the description doesn't explain what the project id is for or how to obtain it. Schema coverage is 50%, so the description only partially compensates; it clarifies the source of cycleId but leaves projectId unexplained, so a 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 states a specific verb ('Get') and resource ('one Cycle in full') and enumerates exactly what fields are returned: status, failure message, engine, timestamps, and metrics. It also distinguishes this tool from siblings like list_monitor_cycles, get_play_status, and get_step_detail, so an agent can tell them apart without opening schemas.

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 explicitly says when to use this tool: with a cycle id from list_monitor_cycles or an Incident's cycle references. It also gives concrete routing guidance to alternatives—pass scriptRunId with project id to get_play_status for per-step results and get_step_detail for the exact failed request/response—and points to the 'monitoring' topic for threshold context. This is explicit when-to-use and when-to-use-other guidance.

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