agent_delegation_capability_token_issuer

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

With no annotations provided, the description must carry the full behavioral disclosure burden. It mentions a cost (0.035 USDC) and the token type, but fails to disclose side effects, permission requirements, whether the operation is read-only or mutative, or what happens on failure. It also does not clarify the output format.

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?

The description is a single, front-loaded sentence that immediately states the purpose and includes a cost note. It is concise and free of fluff, though it could benefit from a brief mention of usage or output without becoming verbose.

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?

Given the tool's complexity (cryptographic tokens, payments) and the absence of an output schema or annotations, the description is incomplete. It does not explain what the tool returns, how payment is handled (especially since paymentSignature is optional in the schema despite a stated cost), or any important behavioral caveats. An agent would lack crucial information to correctly invoke it.

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%, so the schema already documents both parameters. The description adds context about the token type and caveat attenuation, but does not explain the expected structure or content of the payload beyond the generic schema description. It provides marginal value without fully compensating for the lack of specific parameter guidance.

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 clearly states the tool's function: it issues cryptographically signed capability tokens (Macaroons/Biscuits) with caveat attenuation for delegation. It uses specific terminology and explicitly mentions the delegation use case, distinguishing it from sibling tools like signature verifiers or key generators.

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 description implies usage by stating 'for delegating sub-tasks to downstream agents', but it does not provide explicit guidance on when to use it versus alternatives, nor does it mention exclusions or prerequisites. The usage context is only implied.

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