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

With no annotations provided, the description carries full burden for behavioral disclosure. It does not mention whether the tool makes network calls, is read-only, can fail, or has side effects. 'Provides latitude/longitude via Open-Meteo' implies an external lookup but gives no detail.

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?

The description is a single, front-loaded sentence with no fluff. It earns its place by stating the core function, though it is a noun phrase rather than a complete imperative sentence.

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?

Given 9 parameters, no output schema, and no annotations, the description is far from complete. It does not indicate which parameter is the place name, how results are returned, expected errors, or any operational context needed to call the tool correctly.

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?

The tool description mentions no parameters, but the schema already documents all 9 with 100% coverage. Since schema coverage is high, the baseline of 3 applies; the description adds no extra meaning about how parameters relate to the geocoding purpose.

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 clearly states the tool's purpose: returning latitude and longitude for a place via Open-Meteo. It distinguishes geo-hint from weather-related siblings like weather-hint, though it lacks an explicit verb and does not mention which input parameter identifies the place.

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?

No guidance is given on when to use this tool versus alternatives such as weather-hint or timezone-related tools. It does not state conditions for use, exclusions, or when another sibling would be more appropriate.

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