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by com.synoptic
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Set collection column width

set_collection_column_width
DestructiveIdempotent

Set how wide a custom collection’s column appears in the signed-in user’s stream deck in the Synoptic app. Display only: sources, filters and posts are unchanged. Use reorder_collections to change column order and update_collection to change content.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYesCollection ID from list_collections
widthYesColumn width in pixels
streamDeckIdYesDeck ID from list_stream_decks

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYesID of this item for the tools that take it
nameYesDisplay name
filtersYes
aiFilterIdNoAttached AI filter ID for get_ai_filter; null when none
highlightsNo
columnWidthNoColumn width in pixels from set_collection_column_width; null when unset
matchingSourcesOnlyNoWhether the Synoptic app source picker shows only streams with market matching

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • changedOutput schema / properties / highlights / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "isEnabled": {
-        "description": "Whether the highlight rules apply",
-        "type": "boolean"
-      },
-      "values": {
-        "description": "Rules that mark matching post text with a color",
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "color": {
-              "description": "Synoptic app color for matching text, such as lightYellow, green or red",
-              "maxLength": 64,
-              "minLength": 1,
-              "type": "string"
-            },
-            "regex": {
-              "description": "Regular expression, either bare (case-insensitive) or /pattern/flags",
-              "maxLength": 4000,
-              "minLength": 1,
-              "type": "string"
-            }
-          },
-          "required": [
-            "regex",
-            "color"
-          ],
-          "type": "object"
-        },
-        "maxItems": 15,
-        "type": "array"
-      }
-    },
-    "required": [
-      "isEnabled",
-      "values"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "isEnabled": {
+        "description": "Whether the highlight rules apply",
+        "type": "boolean"
+      },
+      "values": {
+        "description": "Rules that mark matching post text with a color",
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "color": {
+              "description": "Synoptic app color for matching text: one of lightYellow, lightOrange, lightTeal, lightBlue, yellow, green, blue, red, orange, purple",
+              "maxLength": 64,
+              "minLength": 1,
+              "type": "string"
+            },
+            "regex": {
+              "description": "Regular expression, either bare (case-insensitive) or /pattern/flags",
+              "maxLength": 4000,
+              "minLength": 1,
+              "type": "string"
+            }
+          },
+          "required": [
+            "regex",
+            "color"
+          ],
+          "type": "object"
+        },
+        "maxItems": 15,
+        "type": "array"
+      }
+    },
+    "required": [
+      "isEnabled",
+      "values"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • changedOutput schema / properties / id / description
      Previous value: -"ID to pass to this item’s get, update, delete or reorder tools"New value: +"ID of this item for the tools that take it"
  2. Changed15 schema fields changed
    • removedInput schema / properties / id / $ref
      Removed value: -"#/properties/streamDeckId"
    • addedInput schema / properties / id / description
      Added value: +"Collection ID from list_collections"
    • addedInput schema / properties / id / maxLength
      Added value: +128
    • addedInput schema / properties / id / minLength
      Added value: +1
    • addedInput schema / properties / id / type
      Added value: +"string"
    • addedInput schema / properties / streamDeckId / description
      Added value: +"Deck ID from list_stream_decks"
    • addedInput schema / properties / width / description
      Added value: +"Column width in pixels"
    • addedOutput schema / properties / aiFilterId / description
      Added value: +"Attached AI filter ID for get_ai_filter; null when none"
    • addedOutput schema / properties / columnWidth / description
      Added value: +"Column width in pixels from set_collection_column_width; null when unset"
    • changedOutput schema / properties / filters / properties / excludeKeywords / anyOf
      Previous value: -[
-  {
-    "$ref": "#/properties/filters/properties/includeKeywords/anyOf/0"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "all": {
+        "anyOf": [
+          {
+            "maxLength": 4000,
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "Space-separated words; a post matches when its text contains every word"
+      },
+      "any": {
+        "anyOf": [
+          {
+            "maxLength": 4000,
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "Space-separated words; a post matches when its text contains at least one word"
+      },
+      "phrase": {
+        "anyOf": [
+          {
+            "maxLength": 4000,
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "Exact phrase; a post matches when its text contains it"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • changedOutput schema / properties / filters / properties / includeKeywords / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "all": {
-        "anyOf": [
-          {
-            "maxLength": 4000,
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "any": {
-        "anyOf": [
-          {
-            "maxLength": 4000,
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "phrase": {
-        "anyOf": [
-          {
-            "maxLength": 4000,
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "all": {
+        "anyOf": [
+          {
+            "maxLength": 4000,
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "Space-separated words; a post matches when its text contains every word"
+      },
+      "any": {
+        "anyOf": [
+          {
+            "maxLength": 4000,
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "Space-separated words; a post matches when its text contains at least one word"
+      },
+      "phrase": {
+        "anyOf": [
+          {
+            "maxLength": 4000,
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "Exact phrase; a post matches when its text contains it"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • changedOutput schema / properties / highlights / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "isEnabled": {
-        "type": "boolean"
-      },
-      "values": {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "color": {
-              "maxLength": 64,
-              "minLength": 1,
-              "type": "string"
-            },
-            "regex": {
-              "maxLength": 4000,
-              "minLength": 1,
-              "type": "string"
-            }
-          },
-          "required": [
-            "regex",
-            "color"
-          ],
-          "type": "object"
-        },
-        "maxItems": 15,
-        "type": "array"
-      }
-    },
-    "required": [
-      "isEnabled",
-      "values"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "isEnabled": {
+        "description": "Whether the highlight rules apply",
+        "type": "boolean"
+      },
+      "values": {
+        "description": "Rules that mark matching post text with a color",
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "color": {
+              "description": "Synoptic app color for matching text, such as lightYellow, green or red",
+              "maxLength": 64,
+              "minLength": 1,
+              "type": "string"
+            },
+            "regex": {
+              "description": "Regular expression, either bare (case-insensitive) or /pattern/flags",
+              "maxLength": 4000,
+              "minLength": 1,
+              "type": "string"
+            }
+          },
+          "required": [
+            "regex",
+            "color"
+          ],
+          "type": "object"
+        },
+        "maxItems": 15,
+        "type": "array"
+      }
+    },
+    "required": [
+      "isEnabled",
+      "values"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • addedOutput schema / properties / id / description
      Added value: +"ID to pass to this item’s get, update, delete or reorder tools"
    • addedOutput schema / properties / matchingSourcesOnly / description
      Added value: +"Whether the Synoptic app source picker shows only streams with market matching"
    • addedOutput schema / properties / name / description
      Added value: +"Display name"
  3. First observed

TDQS

A4.5/5.0
Behavior4/5

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

Annotations already declare idempotentHint=true and openWorldHint=false, so the description is not carrying the safety payload alone. It still adds real value by clarifying that the change is display-only and per-user and that sources, filters, and posts are untouched, which softens the scary destructiveHint=true. It does not say whether the width persists across sessions or what permissions are needed.

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

Conciseness5/5

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

Two tight sentences: the effect first, then the disambiguation, then the alternatives. No filler and nothing important buried at the end.

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

Completeness5/5

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

An output schema exists, so return values need not be explained, and all three required parameters are schema-documented. Given the tool's low complexity, the description covers effect, scope, and sibling boundaries completely.

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

Parameters3/5

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

Schema description coverage is 100%: id (from list_collections), width (pixels, 100-4000), and streamDeckId (from list_stream_decks) are all documented in the schema. The description adds no format or unit detail beyond that, so the baseline 3 applies.

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

Purpose5/5

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

States a specific verb (set), resource (collection column width), and the exact scope (the signed-in user's stream deck in the Synoptic app). It also delineates the boundary against reorder_collections and update_collection, so an agent can distinguish it from siblings without opening any schema.

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

Usage Guidelines5/5

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

Explicitly routes the agent: order changes go to reorder_collections and content changes go to update_collection, leaving this tool for width only. That is a clear when-to-use statement with named alternatives, matching the top of the calibration scale.

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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