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

Annotations already declare readOnlyHint=true, destructiveHint=false, and closed-world, so the safety profile is covered. The description adds the return shape ({id,title,text,url,metadata}), which is valuable since no output schema exists. It omits error behavior when the id is not found, but that is a minor gap for a simple read.

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?

A single sentence that front-loads the verb and resource, then appends the return shape in one compact parenthetical. No sentence or clause is wasted.

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?

Complete for a one-parameter read tool: annotations cover the safety profile and the description covers the return format since there is no output schema. The remaining gap is the unresolved overlap with the get_article sibling and missing not-found behavior.

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% and the id parameter already documents its pattern and that it comes from search results. The description only echoes the provenance ('from search'), adding essentially no syntax or format detail beyond the schema. Baseline 3 applies when the schema does the heavy lifting.

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 ('Fetch') and resource ('a Glitchwire article') with the required key ('by id'). However, it does not distinguish itself from the near-identical sibling get_article, leaving an agent unable to tell which retrieval tool to pick without opening both schemas.

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?

'(from search)' implies the upstream step and therefore when this tool is appropriate, which is genuine implied guidance. But there are no explicit when-not conditions and no mention of the alternative get_article, so usage must be inferred.

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