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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive); the description adds real behavior: page size of 20, per-filter counts returned, unknown filter values ignored rather than erroring, and a `_links.next` cursor for pagination. That is genuinely useful context beyond the structured fields.

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?

Extremely dense but front-loaded: resource and filters first, then paging/combinator rules, then the walk instruction. Every clause carries a distinct fact; no filler sentences.

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?

With no output schema, the description compensates by naming the `_links.next` cursor and the per-filter counts. It does not describe the link records' fields themselves (title, url, etc.), which leaves a small gap for an agent assembling output, but the invocation contract is otherwise fully covered.

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 enum is documented, so the baseline is 3. The description goes beyond it by explaining that values are comma-separated lists with OR semantics inside a parameter and AND across parameters, and that unknown values are dropped rather than rejected — semantics the schema alone does not convey.

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 resource ('curated engineering links') plus the two filtering axes (topic and source type) and enumerates the valid source types inline. It also differentiates from the sibling briefings_topics by noting topic slugs come from that tool.

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?

Gives clear operating context: 20 per page, OR within a parameter, AND across parameters, unknown values silently ignored, and follow `_links.next` to exhaust the set. It implies when to use it (browsing curated links by topic/type) but never states an explicit alternative or when-not condition beyond the briefings_topics pointer.

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