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ableton-mcp

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get_selected_parameter_context

Read-onlyIdempotent

Retrieve the selected Ableton Live native device or mixer parameter without changing focus. Returns exact target ID, bounds, display, automation state, and selection token.

Instructions

Resolve Live’s selected native device or track/Return/Main mixer parameter without changing focus. Includes exact target IDs, control bounds/display/automation and selection token. None, unavailable and unresolved are distinct; chain mixers and hidden controls are unresolved. All profile.

Input Schema

NameRequiredDescriptionDefault

No arguments

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv0.3.1
    • removedOutput schema / additionalProperties
      Removed value: -true
    • addedOutput schema / anyOf
      Added value: +[
+  {
+    "properties": {
+      "automationContext": {
+        "anyOf": [
+          {
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "clipId": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "control": {
+        "anyOf": [
+          {
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "deviceId": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "editContext": {
+        "anyOf": [
+          {
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "identityToken": {
+        "type": "string"
+      },
+      "reason": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "selectionToken": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "setFingerprint": {
+        "type": "string"
+      },
+      "stateVersion": {
+        "minimum": 1,
+        "type": "integer"
+      },
+      "status": {
+        "type": "string"
+      },
+      "supported": {
+        "type": "boolean"
+      },
+      "target": {
+        "anyOf": [
+          {
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "trackId": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "stateVersion"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "error": {
+        "properties": {
+          "message": {
+            "type": "string"
+          },
+          "outcome": {
+            "enum": [
+              "unknown",
+              "not_executed"
+            ]
+          }
+        },
+        "required": [
+          "message",
+          "outcome"
+        ],
+        "type": "object"
+      }
+    },
+    "required": [
+      "error"
+    ],
+    "type": "object"
+  }
+]
  2. Addedv0.3.0

TDQS

A3.7/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already cover readOnly/idempotent/no-destructive, so the bar is lower, and the description still adds real value: focus is preserved, the return payload includes target IDs, bounds, display, automation and a selection token, and the None/unavailable/unresolved states are explicitly separated. Chain mixers and hidden controls being 'unresolved' is a concrete behavioral caveat an agent needs.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded and compact, with the verb and scope in the first clause. However, the trailing fragment 'All profile.' is cryptic and the semicolon-chained status sentence is dense; a little of the terseness costs clarity rather than saving it.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No parameters, a rich annotation block and an output schema that carries the return shape, so the description only needs to convey semantics and edge cases — which it does via the distinct resolution states. The vague 'All profile.' phrase is the one loose end.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool takes zero parameters, so there is nothing for the description to disambiguate. Baseline 4 applies; the description correctly focuses its words on the resolved target rather than inventing parameter guidance.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource: resolve Live's currently selected native device or track/Return/Main mixer parameter, and qualifies it with 'without changing focus'. This distinguishes it clearly from the mutating sibling set_selected_parameter, though it never names any sibling explicitly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is only implied: 'without changing focus' signals this is the read-side counterpart to set_selected_parameter, but the description never says when to prefer it over get_parameter_automation_context or get_selection_context. There are no explicit exclusions or alternative routing.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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