Fix issue 104 - add text content to StaticMapImageTool response for better MCP client compatibility

[jussi-sa]

Description

The static_map_image_tool now returns a structured content array with both text and image content types, following the MCP specification for tool results with multiple content items.

Changes

• StaticMapImageTool.ts: Add descriptive text content as first element in the response array, containing map metadata (center coordinates, zoom, size, style, overlay count)

• StaticMapImageTool.test.ts: Update test expectations for new content array structure and add tests for text content format

• docs/mcp-ui.md: Update documentation to reflect the new response format

  Response Format

Before:

content: [                                                                               
    { type: 'image', data: '...', mimeType: 'image/png' },                                 
    { type: 'resource', ... }  // optional                                                 
  ]                                                                                        

After:

content: [                                                                               
    { type: 'text', text: 'Static map image generated successfully.\nCenter: 40.7128, -74.006\nZoom: 12\n...' },                                                               
    { type: 'image', data: '...', mimeType: 'image/png' },                                 
    { type: 'resource', ... }  // optional
]

• Closes [Issue] Tool responses mix text and JSON instead of using structured content arrays per MCP specification #103

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Testing

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Checklist

• Code has been tested locally
• Unit tests have been added or updated
• Documentation has been updated if needed

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Additional Notes