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data_profile

Read-onlyIdempotent

FULL data quality + compliance report for a table: per-column stats PLUS a 0-100 health score, type-gated PII detection (email / phone / SSN / etc.), and insight warnings. Slower than analyze_table but returns everything needed to audit a table for ownership / compliance / onboarding. Use this when the user says 'profile' or 'quality report' or mentions PII/compliance. [BUILD tier]

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
tableYesTable to profile
connectionNoTarget connection name from this tenant's inventory. Call `list_connections` to see every name + dialect, then match semantically to the user's intent (e.g. 'analytics' → a connection named `*-analytics-*`; 'prod' → a connection with `prod-` prefix). If the user didn't specify, use the tenant's default (first added). Do not invent names — resolve from `list_connections` output.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataNo
metaNo
displayNo
summaryNo
insightsNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed4 schema fields changed
    • changedOutput schema / properties / data / anyOf
      Previous value: -[
-  {
-    "items": {
-      "additionalProperties": true,
-      "properties": {
-        "cardinality": {
-          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
-        },
-        "distinct_count": {
-          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
-        },
-        "isPrimaryKey": {
-          "type": "boolean"
-        },
-        "name": {
-          "type": "string"
-        },
-        "null_pct": {
-          "type": [
-            "number",
-            "string"
-          ]
-        },
-        "nullable": {
-          "type": "boolean"
-        },
-        "pii_risk": {
-          "type": "boolean"
-        },
-        "pii_type": {
-          "type": "string"
-        },
-        "type": {
-          "type": "string"
-        }
-      },
-      "required": [
-        "name"
-      ],
-      "type": "object"
-    },
-    "type": "array"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "code": {
-        "type": "string"
-      },
-      "details": {
-        "additionalProperties": {},
-        "type": "object"
-      },
-      "error": {
-        "type": "string"
-      },
-      "internal_code": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "retry_after_s": {
-        "type": "number"
-      }
-    },
-    "required": [
-      "error"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "items": {
+      "additionalProperties": true,
+      "properties": {
+        "cardinality": {
+          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
+        },
+        "distinct_count": {
+          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
+        },
+        "isPrimaryKey": {
+          "type": "boolean"
+        },
+        "name": {
+          "type": "string"
+        },
+        "null_pct": {
+          "type": [
+            "number",
+            "string"
+          ]
+        },
+        "nullable": {
+          "type": "boolean"
+        },
+        "pii_risk": {
+          "type": "boolean"
+        },
+        "pii_type": {
+          "type": "string"
+        },
+        "type": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "name"
+      ],
+      "type": "object"
+    },
+    "type": "array"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "code": {
+        "type": "string"
+      },
+      "details": {
+        "additionalProperties": {},
+        "type": "object"
+      },
+      "error": {
+        "type": "string"
+      },
+      "internal_code": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "retry_after_s": {
+        "type": "number"
+      },
+      "retryable": {
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "error"
+    ],
+    "type": "object"
+  }
+]
    • addedOutput schema / properties / meta / properties / maskedCells
      Added value: +{
+  "type": "number"
+}
    • addedOutput schema / properties / meta / properties / maskedColumns
      Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
    • addedOutput schema / properties / meta / properties / rowCapReached
      Added value: +{
+  "type": "boolean"
+}
  2. Changed1 schema field changed
    • changedOutput schema / properties / data / anyOf
      Previous value: -[
-  {
-    "items": {
-      "additionalProperties": true,
-      "properties": {
-        "cardinality": {
-          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
-        },
-        "distinct_count": {
-          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
-        },
-        "isPrimaryKey": {
-          "type": "boolean"
-        },
-        "name": {
-          "type": "string"
-        },
-        "null_pct": {
-          "type": [
-            "number",
-            "string"
-          ]
-        },
-        "nullable": {
-          "type": "boolean"
-        },
-        "pii_risk": {
-          "type": "boolean"
-        },
-        "pii_type": {
-          "type": "string"
-        },
-        "type": {
-          "type": "string"
-        }
-      },
-      "required": [
-        "name"
-      ],
-      "type": "object"
-    },
-    "type": "array"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "code": {
-        "type": "string"
-      },
-      "details": {
-        "additionalProperties": {},
-        "type": "object"
-      },
-      "error": {
-        "type": "string"
-      },
-      "internal_code": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "retry_after_s": {
-        "type": "number"
-      }
-    },
-    "type": "object"
-  }
-]New value: +[
+  {
+    "items": {
+      "additionalProperties": true,
+      "properties": {
+        "cardinality": {
+          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
+        },
+        "distinct_count": {
+          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
+        },
+        "isPrimaryKey": {
+          "type": "boolean"
+        },
+        "name": {
+          "type": "string"
+        },
+        "null_pct": {
+          "type": [
+            "number",
+            "string"
+          ]
+        },
+        "nullable": {
+          "type": "boolean"
+        },
+        "pii_risk": {
+          "type": "boolean"
+        },
+        "pii_type": {
+          "type": "string"
+        },
+        "type": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "name"
+      ],
+      "type": "object"
+    },
+    "type": "array"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "code": {
+        "type": "string"
+      },
+      "details": {
+        "additionalProperties": {},
+        "type": "object"
+      },
+      "error": {
+        "type": "string"
+      },
+      "internal_code": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "retry_after_s": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "error"
+    ],
+    "type": "object"
+  }
+]
  3. Changed2 schema fields changed
    • addedInput schema / properties / connection / maxLength
      Added value: +256
    • addedInput schema / properties / table / maxLength
      Added value: +256
  4. Changed2 schema fields changed
    • addedOutput schema / properties / display / properties / map
      Added value: +{
+  "additionalProperties": true,
+  "properties": {
+    "label": {
+      "type": "string"
+    },
+    "lat": {
+      "type": "string"
+    },
+    "lon": {
+      "type": "string"
+    },
+    "title": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}
    • changedOutput schema / properties / display / properties / type / anyOf
      Previous value: -[
-  {
-    "enum": [
-      "table",
-      "chart",
-      "metric",
-      "code",
-      "text",
-      "list"
-    ],
-    "type": "string"
-  },
-  {
-    "type": "string"
-  }
-]New value: +[
+  {
+    "enum": [
+      "table",
+      "chart",
+      "metric",
+      "code",
+      "text",
+      "list",
+      "map"
+    ],
+    "type": "string"
+  },
+  {
+    "type": "string"
+  }
+]
  5. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": true,
+  "properties": {
+    "data": {
+      "anyOf": [
+        {
+          "items": {
+            "additionalProperties": true,
+            "properties": {
+              "cardinality": {
+                "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
+              },
+              "distinct_count": {
+                "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
+              },
+              "isPrimaryKey": {
+                "type": "boolean"
+              },
+              "name": {
+                "type": "string"
+              },
+              "null_pct": {
+                "type": [
+                  "number",
+                  "string"
+                ]
+              },
+              "nullable": {
+                "type": "boolean"
+              },
+              "pii_risk": {
+                "type": "boolean"
+              },
+              "pii_type": {
+                "type": "string"
+              },
+              "type": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "name"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        {
+          "additionalProperties": true,
+          "properties": {
+            "code": {
+              "type": "string"
+            },
+            "details": {
+              "additionalProperties": {},
+              "type": "object"
+            },
+            "error": {
+              "type": "string"
+            },
+            "internal_code": {
+              "type": "string"
+            },
+            "message": {
+              "type": "string"
+            },
+            "retry_after_s": {
+              "type": "number"
+            }
+          },
+          "type": "object"
+        }
+      ]
+    },
+    "display": {
+      "additionalProperties": true,
+      "properties": {
+        "chart": {
+          "additionalProperties": true,
+          "properties": {
+            "chartType": {
+              "type": "string"
+            },
+            "color": {
+              "type": "string"
+            },
+            "title": {
+              "type": "string"
+            },
+            "x": {
+              "type": "string"
+            },
+            "xLabel": {
+              "type": "string"
+            },
+            "y": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "items": {
+                    "type": "string"
+                  },
+                  "type": "array"
+                }
+              ]
+            },
+            "yLabel": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "code": {
+          "additionalProperties": true,
+          "properties": {
+            "executable": {
+              "type": "boolean"
+            },
+            "language": {
+              "anyOf": [
+                {
+                  "enum": [
+                    "sql",
+                    "json",
+                    "bash",
+                    "typescript"
+                  ],
+                  "type": "string"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            "title": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "metric": {
+          "additionalProperties": true,
+          "properties": {
+            "label": {
+              "type": "string"
+            },
+            "status": {
+              "anyOf": [
+                {
+                  "enum": [
+                    "good",
+                    "warning",
+                    "critical"
+                  ],
+                  "type": "string"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            "trend": {
+              "anyOf": [
+                {
+                  "enum": [
+                    "up",
+                    "down",
+                    "neutral"
+                  ],
+                  "type": "string"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            "trendValue": {
+              "type": "string"
+            },
+            "unit": {
+              "type": "string"
+            },
+            "value": {
+              "type": [
+                "string",
+                "number"
+              ]
+            }
+          },
+          "type": "object"
+        },
+        "type": {
+          "anyOf": [
+            {
+              "enum": [
+                "table",
+                "chart",
+                "metric",
+                "code",
+                "text",
+                "list"
+              ],
+              "type": "string"
+            },
+            {
+              "type": "string"
+            }
+          ]
+        }
+      },
+      "type": "object"
+    },
+    "insights": {
+      "items": {
+        "additionalProperties": true,
+        "properties": {
+          "column": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          },
+          "severity": {
+            "anyOf": [
+              {
+                "enum": [
+                  "info",
+                  "warning",
+                  "critical"
+                ],
+                "type": "string"
+              },
+              {
+                "type": "string"
+              }
+            ]
+          },
+          "value": {}
+        },
+        "required": [
+          "severity",
+          "message"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "meta": {
+      "additionalProperties": true,
+      "properties": {
+        "cacheHit": {
+          "type": "boolean"
+        },
+        "connection": {
+          "type": "string"
+        },
+        "dialect": {
+          "anyOf": [
+            {
+              "enum": [
+                "postgres",
+                "mysql",
+                "mssql"
+              ],
+              "type": "string"
+            },
+            {
+              "type": "string"
+            }
+          ]
+        },
+        "executionTimeMs": {
+          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
+        },
+        "plan": {},
+        "rowCount": {
+          "$ref": "#/properties/data/anyOf/0/items/properties/null_pct"
+        },
+        "tool": {
+          "type": "string"
+        },
+        "truncated": {
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "summary": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}
  6. First observed

TDQS

A4.4/5.0
Behavior4/5

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

Annotations already cover safety (readOnlyHint, idempotentHint, openWorldHint), so the description's value-add is the cost/latency tradeoff ('slower than analyze_table') and the scope of what it computes (type-gated PII, insight warnings, BUILD tier). It doesn't mention anything about limits on table size or how PII detection behaves on untyped columns, so it stops short of a 5.

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

Conciseness4/5

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

Front-loads the report contents, then the tradeoff, then the trigger phrases — good ordering with no filler. It is dense and packs several clauses per sentence, which slightly reduces scannability.

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?

With an output schema present, the description only needs to tell the agent what class of result to expect — and it does (stats + health score + PII + warnings), alongside the cost tradeoff and trigger conditions. Nothing needed to call it correctly is missing.

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% and `connection` carries unusually rich resolution guidance (use list_connections, match semantically, don't invent names). The description adds nothing about the two parameters, which is acceptable at this coverage level.

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+resource (full data quality + compliance report for a table) and enumerates the concrete outputs: per-column stats, 0-100 health score, type-gated PII detection, insight warnings. It explicitly positions itself against `analyze_table`, so an agent can distinguish the two without opening a 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?

Gives both a tradeoff cue ('slower than analyze_table') and explicit trigger conditions: user says 'profile'/'quality report' or mentions PII/compliance. The alternative tool is named, giving the agent a routing decision.

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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