Get regex pattern for UUID validation.
| Name | Required | Description | Default |
|---|---|---|---|
| version | No | Version: 1, 4, any | any |
| Name | Required | Description | Default |
|---|---|---|---|
| note | No | ||
| format | No | ||
| strict | No | ||
| country | No | ||
| pattern | Yes | ||
| version | No | ||
| examples | No | ||
| card_type | No | ||
| description | No | ||
| case_insensitive | No | ||
| require_protocol | No | ||
| format_description | No |
Changes observed during successful MCP inspections.
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, so description carries full burden. It only states the purpose and does not disclose any behavioral details such as return format, edge cases, or prerequisites.
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?
Single sentence, concise and to the point. No unnecessary words, but no structure beyond one line.
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 the simple tool with one optional parameter and an output schema, the description is minimally adequate. Lacks context about regex flavor or usage, but overall complete enough for a basic getter.
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% for the one parameter 'version' with description. The description adds no extra meaning beyond the schema, so baseline 3 is appropriate.
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?
Description clearly states 'Get regex pattern for UUID validation' with a specific verb and resource. However, it does not differentiate from sibling tools like validate_uuid or other pattern 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?
No guidance on when to use this tool versus alternatives (e.g., validate_uuid). The description only states what it does without context for selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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