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

Annotations already declare readOnly/idempotent/non-destructive, so the safety profile is covered. The description adds genuinely non-obvious behavioral context the annotations cannot express: that returned descriptions are untrusted data and that listing does not constitute ownership verification or proof of execution.

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 short sentences with the core action front-loaded and the trust caveats following. No filler, though the second sentence is a fragment-style caveat that could be folded in more cleanly.

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 read with no output schema, the description covers what is returned at a high level (registry metadata, setup references) plus the important trust caveats. It does not describe pagination or the shape of the response, but no output schema exists to lean on, so this is close to complete.

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?

There is a single parameter and schema description coverage is 0%, so the schema supplies no meaning. The description only characterizes it indirectly as 'a stable service ID', adding marginal semantic value (implies a canonical/registry ID) but no format or sourcing 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?

States a specific verb+resource ('Read public registry metadata and setup references') scoped to 'a stable service ID', which implies a lookup-by-ID tool rather than a listing/browse tool. It stops short of naming the obvious sibling (discover_services), leaving some ambiguity for an agent choosing between discovery and direct lookup.

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 phrase 'for a stable service ID' implicitly tells the agent this tool needs a known identifier, which distinguishes it from discover_services, but there is no explicit when-to-use / when-not-to-use statement or named alternative. Usage is inferable rather than stated.

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