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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the mutation profile is covered. The description adds real context beyond them: an authorization requirement (the client owner must be the actor) and the downstream blocking effect on dependent work. It does not explain how re-approval is obtained, but the essential behavioral consequence is 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?

Three short sentences with the core action front-loaded and zero filler. The middle sentence ('Requires the client owner') is slightly ambiguous about whether it means the actor's identity or an authorization requirement, which costs a point.

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 an output schema present and full schema coverage, the description only needs to carry purpose, precondition, and consequence — all three are present. Nothing an agent needs in order to call this correctly is 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 100% and each of the three UUID parameters is documented in the schema itself, so the baseline of 3 applies. The description adds only the framing that approvalId identifies an 'earlier approval' belonging to the client owner, no new per-parameter semantics.

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 (withdraws) and a specific resource (one of the client owner's earlier approvals), which clearly separates it from approve-style siblings. It stops short of naming a counterpart tool such as agency_installation_approve, so sibling differentiation is implied rather than explicit.

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?

Gives a prerequisite ('Requires the client owner') and a consequence ('Work that depends on that approval waits until it is approved again'), which tells the agent the operational context. There is no explicit when-not guidance or pointer to the approve/re-approve tool needed to undo the effect.

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