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generateUUID

Generate a random UUID with crypto.randomUUID() for secure and unique identification within the mcp-helper-tools server environment.

Instructions

Generate a random UUID using crypto.randomUUID()

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The handler function for the generateUUID tool. It asynchronously generates a random UUID using Node.js crypto.randomUUID() and returns it wrapped in the MCP content format.
    handler: async () => {
      return {
        content: [{
          type: 'text',
          text: randomUUID()
        }]
      };
    }
  • Input schema for the generateUUID tool, defining an empty object since the tool requires no input parameters.
    inputSchema: {
      type: 'object',
      properties: {}
    },
  • Local registration of the generateUUID tool within the generatorTools object exported from this module.
    generateUUID: {
      name: 'generateUUID',
      description: 'Generate a random UUID using crypto.randomUUID()',
      inputSchema: {
        type: 'object',
        properties: {}
      },
      handler: async () => {
        return {
          content: [{
            type: 'text',
            text: randomUUID()
          }]
        };
      }
    },
  • src/index.ts:27-33 (registration)
    Global registration combining generatorTools (which includes generateUUID) into allTools, used by MCP server handlers for tool listing and execution.
    const allTools: ToolKit = {
      ...encodingTools,
      ...geoTools,
      ...generatorTools,
      ...dateTimeTools,
      ...securityTools
    };
Behavior3/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It specifies the randomness source ('crypto.randomUUID()'), which implies cryptographic quality and platform dependency. However, it doesn't mention performance characteristics, error conditions, or what the output format looks like (e.g., UUID version). The description adds some behavioral context but leaves gaps for a tool with no annotation coverage.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that communicates the essential purpose and implementation method with zero wasted words. It's appropriately sized for a simple, parameterless tool and is perfectly front-loaded with the core functionality.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity (0 parameters, no output schema, no annotations), the description is reasonably complete for basic understanding. However, for a cryptographic tool with no annotations, it should ideally mention the output format (e.g., UUID string format) and any platform dependencies. The description covers the 'what' but could better address the 'what you get' aspect.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has 0 parameters with 100% schema description coverage, so the schema already fully documents the parameter situation. The description appropriately doesn't discuss parameters since none exist, which is correct for this case. Baseline would be 4 for zero parameters, as there's nothing to compensate for.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the specific action ('Generate a random UUID') and the implementation method ('using crypto.randomUUID()'), which precisely distinguishes it from sibling tools like hashData or generateQRCode. It uses a concrete verb+resource combination that leaves no ambiguity about what the tool does.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage context through the technical implementation detail ('crypto.randomUUID()'), suggesting it's for generating unique identifiers in cryptographic contexts. However, it doesn't explicitly state when to use this tool versus alternatives like hashData for different purposes, nor does it provide any exclusion criteria or prerequisites for usage.

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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