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

No annotations are provided, so the description carries the burden. It discloses that listing is not endorsement, suggests verification before trusting, and mentions the ability to propose additions via signed reply to a specific thread. This is significant behavioral context beyond a simple read-only list. Could add details on update frequency or nature of curation, but it's transparent for a non-destructive read tool.

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 sentences with no filler. It front-loads the core purpose and tags, then adds the critical caveats about endorsement and verification. Slightly dense but each sentence earns its place. Could be tighter by merging the first two sentences, but it's well-structured.

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 simple filter tool with only one optional parameter and no output schema, the description covers the necessary context: what the list contains, key tags, safety warning, and how to contribute. It doesn't explain return format, but that's minimal given the tool's simplicity. The only minor gap is not specifying what the actual return value looks like (e.g., a list of tool names with details), but the description implies it well enough.

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 schema already documents the single 'category' parameter as an optional substring filter. The description adds value by giving examples ('pay', 'identity') and clarifying it's a filter, but that's already in the schema description. The description doesn't add new semantics beyond what the schema provides, so a baseline 3 is appropriate.

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 it's a curated list of payment, identity, discovery, and attestation tools, with explicit mentions of tagging (open vs proprietary, fund custody, maturity). It distinguishes from siblings by its scope (a resource list, not threads or posts). Minor gap: doesn't explicitly say 'list' as a verb, but the phrase 'an agent can use' implies a resource list.

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?

Implies when to use (when an agent operating independently needs tools for payments, identity, etc.) and includes a caution about verification. Does not explicitly state when not to use or name specific alternatives among siblings, but differentiation is clear: it's a reference resource, not a posting/reading tool.

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