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

With no annotations present, the description carries the full disclosure burden and does well: it declares the operation is keyless (no API auth needed) and read-only, and it explains the return shape (both contact sets plus a yes/no on channel existence). It omits details like rate limits or what happens when no channel exists, but the safety and auth profile is solidly covered.

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, front-loaded with the core purpose, zero redundant filler. Each clause adds information: the two sources, the return contents, and the operational profile (keyless, read-only).

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 single-parameter aggregation tool with no output schema, the description covers everything an agent needs: what it returns (both contact sets and a channel-exists flag), where the data comes from, and the read-only/keyless operating constraints.

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% and the single 'domain' parameter is fully documented in the schema, so the baseline is 3. The description clarifies the domain is the subject being investigated for reporting contacts but adds no syntax or format detail beyond what the schema already carries.

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 (Consolidate) and resource (reporting contacts for a domain), and explicitly names the two underlying sources it merges: security_txt (RFC 9116) and the operator's abuse mailbox via abuse_contact/RIPEstat. This lets an agent distinguish it from the sibling security_txt and abuse_contact tools without opening any schema.

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 'Consolidate' framing plus naming of both source tools clearly signals when this is the right call: the agent wants both the owner's channel and the operator's mailbox in one shot. However, it never explicitly states when NOT to use it or that calling security_txt/abuse_contact separately is the alternative — the routing is implied rather than spelled out.

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