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

Goes beyond the annotations (idempotent, non-destructive) by disclosing the legal/identity semantics: identityVerified=false, only an account/name declaration is on file, and this is not a verified real-name check or formal e-signature. That is high-value context the agent could not infer elsewhere. It stops short of describing repeat-call behavior, which the idempotentHint already covers.

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?

Dense but front-loaded: the usage prohibition leads, followed by parameter constraints and the caveat. Every clause is operative and nothing is repeated from the schema or annotations.

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 confirmation/mutation tool with no output schema, the critical constraints (user-in-person confirmation, server-sourced revision/hash, non-verified identity status) are all present. The only gap is the unexplained requestId, which an agent must supply but cannot derive from the description.

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 description carries the burden. It usefully specifies that revision and documentHash must come from the server and that legalName is optional, self-provided, and must not be guessed. It says nothing about requestId's role or acknowledged's const-true constraint, leaving two of five parameters undocumented anywhere.

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 action: confirming the current version of a cooperation document, with server-provided revision/documentHash. An agent can tell this records an acknowledgment rather than negotiating or signing, though the title and description don't explicitly route against siblings like kickoff_cooperation or respond_cooperation_proposal.

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?

Explicit when-to-use and hard exclusions: only after the user personally views the version and explicitly confirms, never auto-confirm, never confirm on another party's behalf. This is exactly the precondition an agent must respect before calling a confirmation tool.

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