Static source inference · medium confidence · detected: Logging
Deprecated protocol patterns detected
Summary
The server defines 36 tools with mixed quality. Strengths: clear action verbs in naming (play, stop, track_list, device_set_parameter), well-structured parameters with types and ranges (e.g., BPM constraints 20-999, volume 0-1), descriptive enums for device types and categories, and consistent naming conventions (track_index, clip_slot_index). Weaknesses: 7 tools (track_create, device_inspect_patcher, device_inspect_plugin, arrangement_add_automation_point, session_link_status, push_set_pad_color, push_set_button_led, push_set_mode) lack visible descriptions or parameter documentation in the source excerpt, making 19% of the toolkit underdocumented. Output schemas are not explicitly documented in the sample code. Error handling is not visible in the tool definitions. Most descriptions are adequate but not LLM-optimized (many are under 50 chars, missing dependency hints or prerequisite context). Parameter relationships (e.g., track_index + device_index dependencies) are implicit rather than documented.
Add explicit descriptions to track_create, device_inspect_patcher, device_inspect_plugin, arrangement_add_automation_point, session_link_status, push_set_pad_color, push_set_button_led, push_set_mode. Each description should be 30-150 chars, clarifying what the tool does, when to call it, and any prerequisites.
Add complete input schemas (with proper JSON Schema types, descriptions, and constraints) to the 8 undocumented tools.
Document output schemas for all 36 tools in tool definitions. Specify return type, key fields, and any pagination metadata. E.g., track_list should declare it returns [{track_id, name, type, index}] with optional pagination cursor.
Expand parameter descriptions to 50-150 chars with context. E.g., instead of 'Include master track.', write 'If true, include the master channel in results. Master channel has index -1 and controls session-wide output.'
Add error handling guidance to all WRITE tools. Include recovery hints: e.g., 'If index out of bounds, call track_list to see valid indices (0 to N-1).' Classify errors as retryable (network timeout) vs user-fixable (invalid parameter) vs fatal (permission denied).
Add tool annotations (readOnlyHint: true for read-only tools, destructiveHint: true for delete/reset operations, idempotentHint: true for idempotent operations) to leverage modern MCP client capabilities.
For destructive operations (track_create, device_set_parameter, create_midi_clip), add an optional 'dry_run' or 'preview' parameter. Return the would-be result without applying changes, letting agents validate before committing.
Spec posture evidence
Inferred effective spec: <=2025-11-25.
Relies on Logging (deprecated) - log to stderr or use OpenTelemetry
Parameter descriptions are minimal (mostly under 50 chars). Descriptions like 'Include master track.' lack context on when or why the LLM should set this flag.
No error handling guidance visible. Tools lack recovery hints or error classifications (retryable vs user-fixable vs fatal). Agents given raw errors have no guidance on next steps.
Parameter dependencies not documented. E.g., device_get_parameters requires both track_index and device_index, but no description explains how to discover valid device_index values or what happens if index is out of bounds.
No tool annotations visible (readOnlyHint, destructiveHint, idempotentHint). Risk labels are present in spec but not exposed to client/LLM. Modern MCP should include tool annotations per current spec (2026-07-28).
No dry-run or confirmation pattern visible for destructive operations (delete, create, set_parameter). Agents can make irreversible mistakes without safeguards.
Document parameter dependencies in descriptions. E.g., device_set_parameter: 'Use either parameter_index (0-based, integer) OR parameter_name (string). If both provided, parameter_name takes precedence. Call device_get_parameters first to discover available parameter names and indices.'
Add rate-limiting metadata to tools that interact with external Ableton Live instance. Include estimated execution time and any known bottlenecks (e.g., 'Rendering preview may take 1-5 seconds depending on session complexity').
Implement paginated result patterns for list_* tools. Add limit and offset/cursor parameters, return total count or next_cursor, and cap default results at 20-50 items.
Add human-friendly error messages. Replace raw stack traces or error codes with actionable messages: 'Track index 999 is out of range. Session has 5 tracks (0-4). Use track_list to discover valid indices.'
For tools that construct complex objects (clip_add_notes, clip_set_envelope), add inline examples in the description showing the expected structure. Alternatively, split into simpler sub-tools (e.g., add_single_note before clip_add_notes).