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

Annotations already cover read-only, idempotent, closed-world and non-destructive behavior, so the description earns credit for adding the ENTERPRISE+ entitlement gate, which is a failure mode annotations can't express. It also discloses the response contents (reviews, designated reviewers), though it doesn't say what happens if the CR id doesn't exist.

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?

Two telegraphic clauses: what you get, then the gate condition. Zero filler, and the payload contents are front-loaded ahead of the entitlement caveat.

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?

With no output schema, the description does name the notable return fields (reviews, designated reviewers) and the plan prerequisite. For a one-parameter read tool that is nearly sufficient; only id semantics and lookup-failure behavior are missing.

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% and there is a single required changeRequestId, so the description must carry the burden. It implies the parameter identifies a change request but adds no format, source, or example for the id. The mapping is obvious enough not to be misleading, but nothing is added.

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 (fetch detail) and resource (change request) and enumerates what the payload contains: reviews with per-reviewer decisions plus designated reviewers. This distinguishes it implicitly from list_change_requests and get_change_request_history, though neither sibling is named.

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 'Plan gate: changeControl (ENTERPRISE+)' note tells the agent when it can succeed, which is real usage context. But there is no explicit instruction on when to prefer this over list_change_requests or get_change_request_history, so the when-to-use guidance is only implied.

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