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

Annotations already declare readOnlyHint=false, idempotentHint=true and destructiveHint=true, so the safety profile is partly covered. The description adds non-trivial context the annotations lack: a mandatory human-confirmation gate and a data-minimization rule ('Do not send amount, URL, or account identity'). It does not explain what the destructive effect concretely is, keeping this below a 5.

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: what it does first, the human gate second, the data-exclusion rule third. Nothing redundant, no repetition of schema or annotation content.

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?

An output schema exists, so return values need no explanation, and annotations carry the safety profile. The description covers the human-confirmation workflow and sensitive-field exclusion, leaving only failure/idempotency recovery behavior unstated — a minor gap for a tool this well-covered elsewhere.

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 the baseline is 3, but the description adds a meaningful negative constraint on parameters — which values must NOT be passed (amount, URL, account identity) because they are bound by the confirmation handle. That goes beyond the schema's field-level descriptions.

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 and resource — confirms/executes a previously prepared public order create — and explicitly ties it to the prepare_create sibling. An agent can distinguish this from prepare_create without opening either schema: prepare sets it up, this confirms it.

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 an explicit precondition ('Do not call until the human confirmed the prepare_create amount in the MCP client'), which both sets the when-to-call gate and names the alternative. This is exactly the kind of when/when-not routing the dimension rewards.

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