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

Annotations already cover the safe-read profile (readOnlyHint=true, openWorldHint=false), so the description adds what they cannot: each result carries a slug usable with get_comparison, and the URL pattern for constructing links. It does not mention default page size or pagination in prose, but the limit param is clear in schema.

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?

Four short sentences with the when-to-use clause front-loaded and zero filler. Slightly dense but each sentence (usage, filter, slug, URL) carries distinct information, so nothing 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?

No output schema exists, and the description compensates by telling the agent what each item contains (a slug) and how to use it with get_comparison, plus the canonical URL form. For a simple two-param read-only list tool, nothing an agent needs is missing.

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 baseline is 3; the description adds a small but useful nuance by reiterating that the competitor filter matches either side, and by framing the whole listing as optionally filtered. It doesn't explain ILIKE/substring semantics beyond the schema, keeping it just above baseline.

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 and resource ('browse published competitor-vs-competitor breakdowns') and immediately distinguishes itself from the sibling get_comparison by contrasting browse-listing against slug-fetch. An agent can route between the two without opening either schema.

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?

Explicitly names the when ('user wants to browse... or find one involving a specific competitor') and the when-not ('rather than fetch one specific comparison by slug'), pointing to the alternative tool by slug. Also documents the optional filter's matching behavior.

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