Agent skill

mcp-resource-uri-designer

Design and implement MCP resource URI schemes and templates with proper naming, hierarchy, and documentation.

View SKILL.md on GitHub Repository
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Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/a5c-ai/babysitter/tree/main/library/specializations/cli-mcp-development/skills/mcp-resource-uri-designer

SKILL.md

MCP Resource URI Designer

Design and implement resource URI schemes for MCP servers.

Capabilities

  • Design URI schemes for resources
  • Create URI template patterns
  • Generate URI parsing utilities
  • Document resource hierarchies
  • Implement content type mapping
  • Create resource discovery

Usage

Invoke this skill when you need to:

  • Design URI schemes for MCP resources
  • Create URI template patterns
  • Implement resource hierarchies
  • Document resource APIs

Inputs

Parameter Type Required Description
domain string Yes Resource domain (e.g., files, database)
resources array Yes Resource definitions
language string No Implementation language (default: typescript)

Resource Structure

json
{
  "domain": "database",
  "resources": [
    {
      "pattern": "db://{database}/tables/{table}",
      "name": "Database Table",
      "description": "Access database table schema and data",
      "mimeType": "application/json",
      "parameters": {
        "database": { "description": "Database name" },
        "table": { "description": "Table name" }
      }
    }
  ]
}

Generated Patterns

TypeScript URI Handler

typescript
import { Resource, ResourceTemplate } from '@modelcontextprotocol/sdk/types.js';

// URI Templates
const URI_TEMPLATES = {
  table: 'db://{database}/tables/{table}',
  schema: 'db://{database}/schema',
  query: 'db://{database}/query/{queryId}',
} as const;

// Parse URI to extract parameters
export function parseResourceUri(uri: string): {
  type: keyof typeof URI_TEMPLATES;
  params: Record<string, string>;
} | null {
  const patterns = [
    { type: 'table' as const, regex: /^db:\/\/([^/]+)\/tables\/([^/]+)$/ },
    { type: 'schema' as const, regex: /^db:\/\/([^/]+)\/schema$/ },
    { type: 'query' as const, regex: /^db:\/\/([^/]+)\/query\/([^/]+)$/ },
  ];

  for (const { type, regex } of patterns) {
    const match = uri.match(regex);
    if (match) {
      if (type === 'table') {
        return { type, params: { database: match[1], table: match[2] } };
      } else if (type === 'schema') {
        return { type, params: { database: match[1] } };
      } else if (type === 'query') {
        return { type, params: { database: match[1], queryId: match[2] } };
      }
    }
  }
  return null;
}

// Build URI from parameters
export function buildResourceUri(
  type: keyof typeof URI_TEMPLATES,
  params: Record<string, string>
): string {
  let uri = URI_TEMPLATES[type];
  for (const [key, value] of Object.entries(params)) {
    uri = uri.replace(`{${key}}`, encodeURIComponent(value));
  }
  return uri;
}

// List available resource templates
export function listResourceTemplates(): ResourceTemplate[] {
  return [
    {
      uriTemplate: URI_TEMPLATES.table,
      name: 'Database Table',
      description: 'Access database table schema and data',
      mimeType: 'application/json',
    },
    {
      uriTemplate: URI_TEMPLATES.schema,
      name: 'Database Schema',
      description: 'Full database schema information',
      mimeType: 'application/json',
    },
  ];
}

URI Design Guidelines

Scheme Selection

  • file:// - File system resources
  • db:// - Database resources
  • http://, https:// - Web resources
  • git:// - Git repository resources
  • Custom schemes for domain-specific resources

Hierarchy Patterns

db://{database}/tables/{table}
db://{database}/tables/{table}/rows/{rowId}
db://{database}/views/{view}
db://{database}/functions/{function}

file:///{path}
file:///projects/{project}/src/{file}

git://{repo}/branches/{branch}/files/{path}

Workflow

  1. Analyze domain - Understand resource types
  2. Design scheme - Choose URI scheme
  3. Define templates - Create URI patterns
  4. Generate parser - URI parsing utilities
  5. Create builder - URI construction helpers
  6. Document resources - API documentation

Target Processes

  • mcp-resource-provider
  • mcp-server-bootstrap
  • mcp-tool-documentation

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