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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered and the description's real contribution is telling the caller what the payload contains (snippets per client, env vars, packages, scores). It adds no further behavior such as response size, error/not-found handling, or whether env vars may be masked — reasonable for a simple read, but not rich.

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?

One front-loaded sentence: verb and scope first, then the enumerated payload. Nothing is redundant or padded.

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 one-param read with no output schema, enumerating the returned fields is exactly the right compensating detail. Remaining gaps are minor: no not-found/error behavior and no note on how to obtain a valid slug.

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?

Single parameter with 0% schema description coverage, so the description must carry the load: 'by slug' does label the identifier's role, adding real meaning the schema lacks. However it does not say where the slug comes from, expected format, or whether it is case-sensitive, leaving a gap given the schema has no description at all.

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+key ('Full details for one server by slug') and even enumerates the returned content (install snippets, env vars, packages, scores). It is clearly a single-record lookup, distinguishable in kind from search_servers/compare_servers, though it never names those siblings explicitly.

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 'by slug' implies you must already have a slug (e.g., from search_servers) and that this is the follow-up detail call, but there is no explicit when-to-use framing, no statement of when to prefer compare_servers or search_servers, and no mention of what happens for an unknown slug.

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