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

No annotations are provided, so the description carries the full burden. It does disclose the meaningful behavior that this is a two-outcome mutation (confirm on success, cancel otherwise), which the schema alone doesn't state. However, it omits what canceling entails (whether funds are released), idempotency, error behavior, and required permissions.

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 short sentences with zero waste, and the core action is front-loaded before the timing constraint.

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 two-parameter mutation tool with no output schema, the description plus the fully covered schema give enough to call it correctly. Remaining gaps (idempotency, effects of cancel, sibling differentiation) are real but modest for this tool's complexity.

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 coverage is 100%, so both parameters are already documented, giving a baseline of 3. The description implies that the success boolean drives the confirm/cancel branch, adding slight meaning beyond the schema's "true if payment succeeded," but no format or edge-case detail.

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 pair and resource: "Confirm or cancel a payment hold." This resolves the ambiguity of the bare name 'settle'. It does not differentiate from the sibling 'release', which sounds like it also cancels a hold, so it falls short of a 5.

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?

"Call AFTER payment succeeds or fails" gives a clear sequencing precondition for invocation. It offers no exclusion or comparison against siblings like release or refund, so the when-not guidance is missing.

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