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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and closed-world operation. The description adds genuinely non-redundant context with the caveat that configured payment methods do not prove live provider connectivity, warning the agent not to over-trust the output. It stops short of describing response shape or freshness.

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. The purpose is front-loaded and the caveat follows immediately, earning its place as a trust warning rather than filler.

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 zero-parameter, read-only introspection tool with rich annotations and no output schema, the description covers what is returned and adds an important reliability caveat. The only gap is that the vague term 'workflow' is never unpacked, so the agent cannot fully anticipate the payload.

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?

The tool takes zero parameters, so the baseline is 4. There is no parameter syntax the description needs to compensate for, and nothing is missing on this dimension.

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 states a specific verb (Discover) and enumerates the resources returned: workflow, rate limits, and configured payment methods. It is clear what the tool does, but it does not differentiate itself from overlapping siblings such as list_payment_methods or list_services, which also surface configuration.

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?

There is no explicit when-to-use or when-not-to-use guidance, nor any mention of alternatives. An agent must infer from the purpose statement alone that this is the discovery/introspection entry point, and the overlap with list_payment_methods is left unaddressed.

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