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

With readOnlyHint=true and openWorldHint=false already covering the safety profile, the description adds real behavioral context: same-owner products are excluded from the ranking, parked in meta.query.family, and only re-ranked with include_family=true where they are flagged same_estate. That is meaningful disclosure about ranking semantics not present in annotations.

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?

Two dense sentences with the primary purpose front-loaded and the ranking exclusion handled second. Slightly compressed terminology ('a sister, not a rival') costs a little clarity but carries useful distinction without waste.

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 read-only discovery tool with no output schema, the description supplies the essentials: what similarity means, what is excluded by default, where excluded items appear, and how to include them. Only the ranking/ordering of results and pagination behavior beyond the limit parameter are left implicit.

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 all four parameters are already documented, including include_family and the 'context is never used to rank' note. The description restates the include_family behavior and output-side family/same_estate handling rather than adding new parameter meaning, so the baseline 3 applies.

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 ('Providers similar to a given one (alternatives)') and enumerates the exact similarity dimensions (tags, areas, industry, region, artifact coverage). An agent can distinguish it from siblings like compare_providers, match_providers, and find_providers without opening any 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?

Usage is clearly implied — call it to get alternatives to one known provider — and the family-vs-rival distinction gives practical context. However, it never names when to prefer this over match_providers or compare_providers, so the routing guidance among near-siblings is left to inference.

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