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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds the otherwise unavailable return format ("full Markdown"), which matters because there is no output schema. It says nothing about error behavior for a missing slug or article size limits, so it is not fully complete.

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 return value, tool resource, and lookup key with zero filler. Every clause earns its place.

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-parameter read tool with annotations covering safety and a description covering return format and slug derivation, this is nearly complete. It omits only edge-case behavior (unknown slug, large articles), which is a minor gap.

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 baseline is 3, but the description genuinely adds meaning by explaining that the slug is the last segment of the help-article URL — useful derivation info the schema ("Article slug") does not provide. It does not restate the pattern/length constraints already in the schema.

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 names a specific verb and resource ("Return the full Markdown of a Linkbreakers help center article") and specifies the lookup key (slug), so an agent knows exactly what this does. It stops short of contrasting itself with siblings like search_docs, leaving the read-one-vs-search-many distinction implicit.

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?

Usage is implied rather than stated: the tool is for fetching a known article, and the URL hint suggests you already have a specific slug in hand. There is no explicit when-to-use guidance or mention of search_docs as the alternative when the slug is unknown.

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