Retrieve all available timezone codes from Pubrio's reference data. No credits required.
Reference data: get all available timezone codes (free, no credits)
This tool declares no required parameters. Add optional parameters from the input schema as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {},
"name": "get_timezones"
}
}| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Changes observed during successful MCP inspections.
v1.0.2Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description must carry the burden of behavioral disclosure. It implies a read-only, non-destructive operation but lacks details on response format, size, rate limits, or caching behavior. Given the simplicity of the tool (no parameters), the description is adequate but not thorough.
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 sentence that effectively conveys the purpose and a key benefit. It is extremely concise, front-loaded with the core action, and contains no wasted words.
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 tool with no parameters and no output schema, the description provides the essential information: it returns all timezone codes. It is complete enough for an agent to understand the tool's function, though it could optionally mention the output format or typical use case.
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 input schema has zero parameters with 100% coverage, so the description does not need to add parameter details. It adds value by specifying the output will be 'timezone codes,' which goes beyond what the schema provides (which only specifies no parameters).
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 retrieves all available timezone codes. It uses a specific verb ('get') and specifies the resource ('timezone codes'). Among siblings, it is distinct as a reference data tool for timezones, clearly differentiating from other data retrieval tools.
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 description mentions 'Reference data' and 'free, no credits,' hinting at low cost and suitability for lookups. However, it does not explicitly state when to use this tool over alternatives like enrich_company or get_locations, nor does it provide exclusions or context on when not to use it.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.