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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds real value by enumerating what comes back (machine-readable status, plain-language stage and message, live address when available), which matters because there is no output schema. It does not say what happens when the app has no deployment yet or what error/empty result to expect.

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, front-loaded with the core action and followed by the return payload. Every clause carries information; there is no filler or repetition 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 one-parameter read tool with annotations and no output schema, the description covers purpose and return shape well enough to invoke it correctly. The remaining gap is edge-case behavior (no deployment, failed deployment), which is minor but would help an agent interpret results.

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 0%, so the single appId parameter is undocumented in the schema apart from its UUID format. The phrase 'an app's most recent deployment' implies appId identifies the target app, but the description adds no further semantics such as whether unknown IDs error or whether non-app IDs are rejected.

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 gives a specific verb and resource ('Returns the status of an app's most recent deployment') and pins the scope to the latest deployment, which no sibling (get_logs, list_apps, deploy) covers. It stops short of explicitly naming an alternative, so it is clear but not maximally differentiated.

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?

Usage is only implied: an agent can infer this is the tool to call after deploy or when checking a deployment's progress. There is no explicit when-to-use statement, no mention of polling behavior, and no exclusion pointing to get_logs for failure investigation.

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