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by co.thinair.data
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query_firewall

Destructive

Manage and test per-connection SQL firewall rules that block, warn, or log matching queries — distinct from pii_scan, which scans stored data (not SQL text) for PII. action=add_rule creates a rule (rule_name + RE2 pattern; optional block_action: block/warn/log, default block — only "block" is enforced, "warn"/"log" are advisory-only). action=remove_rule deletes by name or id. action=list_rules is read-only. action=test_query checks a sql string against the built-in guard plus your rules and returns a verdict without running it. add_rule/remove_rule write; changes take effect within 60s. All actions count against quota. Limits: 50 rules/connection, 512-char patterns. [ARCHITECT tier]

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sqlNoSQL to test against rules
actionYesWhat to do
messageNoMessage shown when rule triggers
patternNoRegex pattern to match
rule_nameNoRule name
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.
block_actionNoAction when matched (default block)

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": {
-        "action": {
-          "type": "string"
-        },
-        "message": {
-          "type": "string"
-        },
-        "name": {
-          "type": "string"
-        },
-        "pattern": {
-          "type": "string"
-        }
-      },
-      "type": "object"
-    },
-    "type": "array"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "action": {
-        "type": "string"
-      },
-      "added": {
-        "type": "boolean"
-      },
-      "message": {
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      },
-      "pattern": {
-        "type": "string"
-      },
-      "rule_name": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "action": {
-        "type": "string"
-      },
-      "allowed": {
-        "type": "boolean"
-      },
-      "matched": {
-        "type": "boolean"
-      },
-      "matched_rule": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "rule": {
-        "type": [
-          "string",
-          "null"
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "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": {
+        "action": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        },
+        "pattern": {
+          "type": "string"
+        }
+      },
+      "type": "object"
+    },
+    "type": "array"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "action": {
+        "type": "string"
+      },
+      "added": {
+        "type": "boolean"
+      },
+      "message": {
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      },
+      "pattern": {
+        "type": "string"
+      },
+      "rule_name": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "action": {
+        "type": "string"
+      },
+      "allowed": {
+        "type": "boolean"
+      },
+      "matched": {
+        "type": "boolean"
+      },
+      "matched_rule": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "rule": {
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "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": {
-        "action": {
-          "type": "string"
-        },
-        "message": {
-          "type": "string"
-        },
-        "name": {
-          "type": "string"
-        },
-        "pattern": {
-          "type": "string"
-        }
-      },
-      "type": "object"
-    },
-    "type": "array"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "action": {
-        "type": "string"
-      },
-      "added": {
-        "type": "boolean"
-      },
-      "message": {
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      },
-      "pattern": {
-        "type": "string"
-      },
-      "rule_name": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "action": {
-        "type": "string"
-      },
-      "allowed": {
-        "type": "boolean"
-      },
-      "matched": {
-        "type": "boolean"
-      },
-      "matched_rule": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "rule": {
-        "type": [
-          "string",
-          "null"
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "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": {
+        "action": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        },
+        "pattern": {
+          "type": "string"
+        }
+      },
+      "type": "object"
+    },
+    "type": "array"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "action": {
+        "type": "string"
+      },
+      "added": {
+        "type": "boolean"
+      },
+      "message": {
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      },
+      "pattern": {
+        "type": "string"
+      },
+      "rule_name": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "action": {
+        "type": "string"
+      },
+      "allowed": {
+        "type": "boolean"
+      },
+      "matched": {
+        "type": "boolean"
+      },
+      "matched_rule": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "rule": {
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "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. Changed5 schema fields changed
    • addedInput schema / properties / connection / maxLength
      Added value: +256
    • addedInput schema / properties / message / maxLength
      Added value: +500
    • addedInput schema / properties / pattern / maxLength
      Added value: +2000
    • addedInput schema / properties / rule_name / maxLength
      Added value: +256
    • addedInput schema / properties / sql / maxLength
      Added value: +50000
  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": {
+              "action": {
+                "type": "string"
+              },
+              "message": {
+                "type": "string"
+              },
+              "name": {
+                "type": "string"
+              },
+              "pattern": {
+                "type": "string"
+              }
+            },
+            "type": "object"
+          },
+          "type": "array"
+        },
+        {
+          "additionalProperties": true,
+          "properties": {
+            "action": {
+              "type": "string"
+            },
+            "added": {
+              "type": "boolean"
+            },
+            "message": {
+              "type": "string"
+            },
+            "name": {
+              "type": "string"
+            },
+            "pattern": {
+              "type": "string"
+            },
+            "rule_name": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        {
+          "additionalProperties": true,
+          "properties": {
+            "action": {
+              "type": "string"
+            },
+            "allowed": {
+              "type": "boolean"
+            },
+            "matched": {
+              "type": "boolean"
+            },
+            "matched_rule": {
+              "type": "string"
+            },
+            "message": {
+              "type": "string"
+            },
+            "rule": {
+              "type": [
+                "string",
+                "null"
+              ]
+            }
+          },
+          "type": "object"
+        },
+        {
+          "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": {
+          "type": [
+            "number",
+            "string"
+          ]
+        },
+        "plan": {},
+        "rowCount": {
+          "$ref": "#/properties/meta/properties/executionTimeMs"
+        },
+        "tool": {
+          "type": "string"
+        },
+        "truncated": {
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "summary": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}
  6. First observed

TDQS

A4.6/5.0
Behavior4/5

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

Adds substantial context beyond the annotations: only 'block' is actually enforced while 'warn'/'log' are advisory, changes take effect within 60s, every action counts against quota, and explicit limits (50 rules/connection, 512-char patterns). This is exactly the kind of operational disclosure annotations cannot carry, though return/pagination behavior is left to the output schema.

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?

Dense but front-loaded: the tool's purpose and sibling distinction come first, then per-action semantics, then limits. Long single paragraph, but every clause for a 7-param multi-action tool earns its place.

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, return values need no explanation, and the description covers all action modes, enforcement nuance, timing, quota, and hard limits. An agent has everything needed to invoke correctly.

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?

Schema coverage is already 100%, so the baseline is 3, but the description adds real semantics: pattern is an RE2 regex, block_action defaults to block and only 'block' is enforced, and rule_name pairs with add_rule. This meaningfully exceeds the terse schema descriptions.

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 ('Manage and test per-connection SQL firewall rules') and immediately names the sibling it must not be confused with ('distinct from pii_scan, which scans stored data'). An agent can tell it apart from pii_scan and the query tools 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?

Breaks down all four action values with explicit semantics (add_rule creates, remove_rule deletes, list_rules is read-only, test_query checks without running) and names the alternative tool (pii_scan) with its distinguishing condition. Routing is fully specified.

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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