docs: add purpose parameter to README and bump version to 0.5.0

- Add purpose parameter documentation to API Reference table
- Update version to 0.5.0 in package.json, package-lock.json, server.json

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: shinpr

README.md

@@ -178,6 +178,7 @@ The MCP server exposes a single tool for all image operations. Internally, it us
 | `maintainCharacterConsistency` | boolean | - | Maintain character appearance consistency across different poses and scenes |
 | `useWorldKnowledge` | boolean | - | Use real-world knowledge for accurate context (recommended for historical figures, landmarks, or factual scenarios) |
 | `useGoogleSearch` | boolean | - | Enable Google Search grounding to access real-time web information for factually accurate image generation. Use when prompt requires current or time-sensitive data that may have changed since the model's knowledge cutoff. Leave disabled for creative, fictional, historical, or timeless content. |
+| `purpose` | string | - | Intended use for the image (e.g., "cookbook cover", "social media post", "presentation slide"). Helps tailor visual style, quality level, and details to match the purpose. |
 
 #### Response
 

package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "mcp-image",
   "mcpName": "io.github.shinpr/mcp-image",
-  "version": "0.4.2",
+  "version": "0.5.0",
   "description": "MCP server for AI image generation",
   "main": "dist/index.js",
   "bin": {

package.json

@@ -8,13 +8,13 @@
     "url": "https://github.com/shinpr/mcp-image",
     "source": "github"
   },
-  "version": "0.4.2",
+  "version": "0.5.0",
   "packages": [
     {
       "registryType": "npm",
       "registryBaseUrl": "https://registry.npmjs.org",
       "identifier": "mcp-image",
-      "version": "0.4.2",
+      "version": "0.5.0",
       "transport": {
         "type": "stdio"
       },