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AdsAgent — Meta Ads MCP

by md.adsagent
OverviewDiscussionsAdmin

assets_list_ad_accounts

List Meta ad accounts this workspace can use, with routing flags. Cache miss/authorized refresh may queue private work; filter then paginate; assets_lookup_business_links

Input Schema

NameRequiredDescriptionDefault
limitNo
cursorNo
searchNo
refreshNo
fb_user_labelNo

Output Schema

NameRequiredDescriptionDefault
messageNo
retryableNo
support_refNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • removedInput schema / properties / connection_context
      Removed value: -{
-  "pattern": "^mctx_v1_[0-9a-f]{64}$",
-  "type": "string"
-}
  2. Changed6 schema fields changed
    • addedOutput schema / then / properties / category
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / then / properties / expected
      Added value: +{
+  "type": "boolean"
+}
    • addedOutput schema / then / properties / failure_kind
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / then / properties / responsibility_hint
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / then / properties / route
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / then / properties / user_visible
      Added value: +{
+  "type": "boolean"
+}
  3. Changed1 schema field changed
    • addedInput schema / properties / connection_context
      Added value: +{
+  "pattern": "^mctx_v1_[0-9a-f]{64}$",
+  "type": "string"
+}
  4. Changed13 schema fields changed
    • addedOutput schema / $defs
      Added value: +{
+  "s0": {
+    "items": {
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "name": {
+          "type": [
+            "null",
+            "string"
+          ]
+        }
+      },
+      "required": [
+        "id"
+      ],
+      "type": "object"
+    },
+    "type": "array"
+  },
+  "s2": {
+    "properties": {
+      "count": {
+        "type": "integer"
+      },
+      "has_more": {
+        "type": "boolean"
+      },
+      "items": {
+        "$ref": "#/$defs/s0"
+      }
+    },
+    "required": [
+      "count",
+      "items",
+      "has_more"
+    ],
+    "type": "object"
+  },
+  "s3": {
+    "properties": {
+      "status": {
+        "enum": [
+          "requires_validation",
+          "awaiting_assets",
+          "blocked"
+        ],
+        "type": "string"
+      },
+      "summary": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "status",
+      "summary"
+    ],
+    "type": "object"
+  }
+}
    • addedOutput schema / else / properties / items / items / properties / pages / $ref
      Added value: +"#/$defs/s0"
    • removedOutput schema / else / properties / items / items / properties / pages / items
      Removed value: -{
-  "properties": {
-    "id": {
-      "type": "string"
-    },
-    "name": {
-      "type": [
-        "null",
-        "string"
-      ]
-    }
-  },
-  "required": [
-    "id"
-  ],
-  "type": "object"
-}
    • removedOutput schema / else / properties / items / items / properties / pages / type
      Removed value: -"array"
    • addedOutput schema / else / properties / items / items / properties / pixels / $ref
      Added value: +"#/$defs/s0"
    • removedOutput schema / else / properties / items / items / properties / pixels / items
      Removed value: -{
-  "properties": {
-    "id": {
-      "type": "string"
-    },
-    "name": {
-      "type": [
-        "null",
-        "string"
-      ]
-    }
-  },
-  "required": [
-    "id"
-  ],
-  "type": "object"
-}
    • removedOutput schema / else / properties / items / items / properties / pixels / type
      Removed value: -"array"
    • addedOutput schema / else / properties / refresh_meta / properties / created_at
      Added value: +{
+  "type": [
+    "null",
+    "string"
+  ]
+}
    • addedOutput schema / else / properties / refresh_meta / properties / finished_at
      Added value: +{
+  "type": [
+    "null",
+    "string"
+  ]
+}
    • addedOutput schema / else / properties / refresh_meta / properties / launch_readiness
      Added value: +{
+  "$ref": "#/$defs/s3"
+}
    • addedOutput schema / else / properties / refresh_meta / properties / refresh_summary
      Added value: +{
+  "properties": {
+    "failed_connections": {
+      "items": {
+        "properties": {
+          "label": {
+            "type": "string"
+          },
+          "reason": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "label",
+          "reason"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "failed_connections_count": {
+      "type": "integer"
+    },
+    "failed_connections_has_more": {
+      "type": "boolean"
+    },
+    "launch_readiness": {
+      "$ref": "#/$defs/s3"
+    },
+    "observed_at": {
+      "type": [
+        "null",
+        "string"
+      ]
+    },
+    "routing_errors": {
+      "type": "integer"
+    },
+    "scope": {
+      "enum": [
+        "tenant",
+        "fb_user"
+      ],
+      "type": "string"
+    },
+    "updated_assets": {
+      "properties": {
+        "ad_accounts": {
+          "$ref": "#/$defs/s2"
+        },
+        "businesses": {
+          "$ref": "#/$defs/s2"
+        },
+        "pages": {
+          "$ref": "#/$defs/s2"
+        }
+      },
+      "required": [
+        "ad_accounts",
+        "pages",
+        "businesses"
+      ],
+      "type": "object"
+    }
+  },
+  "required": [
+    "observed_at",
+    "scope",
+    "updated_assets",
+    "failed_connections",
+    "launch_readiness"
+  ],
+  "type": [
+    "null",
+    "object"
+  ]
+}
    • addedOutput schema / else / properties / refresh_meta / properties / requested_scope
      Added value: +{
+  "enum": [
+    "tenant",
+    "fb_user"
+  ],
+  "type": "string"
+}
    • addedOutput schema / else / properties / refresh_meta / properties / started_at
      Added value: +{
+  "type": [
+    "null",
+    "string"
+  ]
+}
  5. First observed

TDQS

A3.5/5.0
Behavior4/5

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

The annotations say readOnlyHint=false with destructiveHint=false, which is confusing for a 'List' tool; the description resolves it by disclosing that cache miss/authorized refresh can queue private work — a real write side effect beyond what annotations encode. It stops short of saying whether queued work is async or how long it takes.

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?

Very short and the purpose is front-loaded, but the semicolon fragments and the bare trailing tool name read as notes rather than sentences, costing clarity for the space saved.

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

Completeness3/5

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 the mutating side effect is covered. With five undocumented parameters and no stated prerequisites for the private-work path, it is only minimally complete.

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 coverage is 0%, so the description carries the burden. It maps loosely onto four of five params — filtering (search), pagination (limit/cursor), refresh — but never names them, and fb_user_label ('routing flags'?) stays ambiguous.

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 and resource ('List Meta ad accounts') plus scope ('this workspace can use') and an output trait ('with routing flags'). It is distinguishable from assets_list_businesses / assets_list_pages, though it never explicitly contrasts itself with those siblings.

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?

'filter then paginate' gives an operating hint and 'Cache miss/authorized refresh may queue private work' tells the agent a refresh has cost. The dangling 'assets_lookup_business_links' implies a fallback but never states the condition that selects it, so usage is only implied.

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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