Hreflang Generator

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

Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description adds one genuinely useful behavioral note — that language codes are validated — but says nothing about what happens on invalid codes, error behavior, or whether output is returned as a string or file.

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 front-loaded sentence with no filler, so nothing needs trimming. It is efficient, though the brevity leaves obvious gaps that a slightly longer description could have filled.

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 generator with no output schema, an agent still needs the input shape (required entries array, lang/url pairing, purpose of xDefault) and ideally the return format. The description supplies neither, leaving the two undocumented parameters to be inferred purely from raw JSON Schema types.

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 description coverage is 0% and the description documents neither 'entries' (a required array of lang/url objects) nor 'xDefault'. 'Language code validation' is a faint hint about the 'lang' field but gives no format (ISO 639-1? with region?) and omits the required entries structure entirely.

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 (generate) and resource (hreflang alternate link tags) with a clear scope of multilingual/regional pages, which distinguishes it implicitly from siblings like meta_tag_generator or xml_sitemap_generator. It does not name an alternative explicitly, so it stops short of a 5.

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?

The phrase 'for multilingual/regional pages' implies the applicable context but never states when to use this over sibling generators or any prerequisite conditions. No exclusions or alternatives are offered, so usage is only implied.

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