Five tools with clear naming and reasonable descriptions, but multiple schema and documentation gaps reduce overall quality. Tool names follow verb_noun pattern (assets_upload, assets_list, etc.), which is good. Descriptions are moderately detailed (avg ~100 chars) and mention the primary action. However, parameter descriptions lack specificity around constraints and formats. No output schemas are documented for the response structure (what fields the agent receives). Error handling exists but is minimal, no recovery guidance or actionable error messages. Parameters mostly have type definitions but lack constraints (e.g., limit 1-1000, no documentation of what happens when limit is omitted). No tool annotations (readOnlyHint/destructiveHint) visible despite multiple destructive operations (delete, copy). Security: credentials properly injected via environment variable (BLOB_READ_WRITE_TOKEN), which is correct. Composition is sound, tools are single-purpose and chainable, but response documentation would improve usability.

• Add explicit outputSchema to each tool definition. Example for assets_upload: { type: 'object', properties: { url: { type: 'string', description: 'Public URL of uploaded file' }, pathname: { type: 'string' }, contentType: { type: 'string' }, size: { type: 'number' } }, required: ['url'] }
• Add tool annotation hints to schema. Mark assets_delete and assets_copy with destructiveHint: true in capabilities. Mark assets_list, assets_head with readOnlyHint: true. This enables agent UIs to warn before destructive operations.
• Document parameter constraints explicitly in JSON Schema. Add minimum: 1, maximum: 1000 to assets_list limit parameter. Add pattern or maxLength to pathname parameters.
• Enhance error messages with actionable guidance. Example: throw new Error('localPath is required and must be a string pointing to an existing file. Provide an absolute file path, e.g. /home/user/image.jpg') instead of generic 'localPath is required and must be a string'.
• Clarify idempotency behavior. Document in assets_upload description: 'If called twice with the same localPath and pathname, the file is overwritten. Provide a unique pathname to create a copy.' Similar clarity for assets_copy.
• Return structured output with all chaining IDs. assets_list returns blobs with url and pathname, ensure downstream tools (assets_head, assets_delete, assets_copy) accept the exact format returned. Verify field names match between response and parameter expectations.
• Add batch operation variant. Consider assets_delete_batch or extend assets_delete to accept both single URL and array. Current implementation accepts array, which is good for composition.