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

Annotations already declare readOnlyHint=true, idempotentHint=true and openWorldHint=false, so the safety profile is fully covered without prose. The description adds the content scope of the read (the five returned sections), which is useful but modest; it discloses nothing about auth, rate limits, or retrieval behavior.

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 sentence with the verb and target front-loaded and a compact enumeration of returned fields. No filler, no restatement of the title.

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 single-param, read-only tool with no output schema, the description usefully enumerates the return payload, compensating for the missing output contract, and annotations cover safety. What remains unaddressed is the tie to get_plan and any notion of what happens when play_id is invalid or absent.

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?

One parameter with 100% schema description coverage, including its origin ('Play id from get_plan'), so the schema already does the work. The description adds no additional meaning about play_id format or provenance, warranting the baseline 3.

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?

States a specific verb ('read') and resource ('full detail of one growth play') and enumerates the payload (rationale, steps, tools, budget, success metric). It does not, however, contrast itself with the adjacent get_plan or update_play_status siblings, so differentiation is left to inference.

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 gives no when-to-use guidance, no prerequisites, and names no alternative. The schema's 'Play id from get_plan' hints at the get_plan dependency, but that workflow context is not carried into the description itself.

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