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Policy Report

tb_policy

Evaluate policy classification for a target URL on the public docs and research web surface. Supports browser-backed acquisition with risk labels and domain restrictions.

Instructions

Return the policy evaluation for a target or daemon tab on the public docs/research web surface.

Input Schema

TableJSON Schema

Name	Required	Description
`target`	No	The URL or target whose policy classification should be reported.
`browser`	No	When true, use the browser-backed acquisition path for this operation.
`sourceRisk`	No	The source risk label to attach to the result or citation.
`sourceLabel`	No	The human-readable source label to attach to the result or citation.
`allowDomains`	No	Restrict the operation to this list of allowed domains.
`sessionId`	No	The browser session to use for this operation.
`tabId`	No	The specific tab to use inside the session. If omitted, the active tab is used.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`policy`	No
`sessionState`	No
`sessionId`	No
`tabId`	No
`diagnostics`	No
`result`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed8 schema fields changedv0.7.0Jun 12, 2026

addedInput schema / properties / allowDomains / description

Added value: +"Restrict the operation to this list of allowed domains."

addedInput schema / properties / browser / description

Added value: +"When true, use the browser-backed acquisition path for this operation."

addedInput schema / properties / sessionId / description

Added value: +"The browser session to use for this operation."

addedInput schema / properties / sourceLabel / description

Added value: +"The human-readable source label to attach to the result or citation."

addedInput schema / properties / sourceRisk / description

Added value: +"The source risk label to attach to the result or citation."

addedInput schema / properties / tabId / description

Added value: +"The specific tab to use inside the session. If omitted, the active tab is used."

addedInput schema / properties / target / description

Added value: +"The URL or target whose policy classification should be reported."

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": false,
+  "minProperties": 1,
+  "properties": {
+    "diagnostics": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "policy": {
+      "additionalProperties": false,
+      "properties": {
+        "allowlistedDomains": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "blockedRefs": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "decision": {
+          "type": "string"
+        },
+        "riskClass": {
+          "type": "string"
+        },
+        "signals": {
+          "items": {
+            "additionalProperties": false,
+            "properties": {
+              "detail": {
+                "type": "string"
+              },
+              "kind": {
+                "type": "string"
+              },
+              "origin": {
+                "type": "string"
+              },
+              "stableRef": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "kind",
+              "origin",
+              "detail"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "sourceRisk": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "decision",
+        "sourceRisk",
+        "riskClass",
+        "blockedRefs",
+        "signals"
+      ],
+      "type": "object"
+    },
+    "result": {
+      "additionalProperties": false,
+      "properties": {
+        "policy": {
+          "additionalProperties": false,
+          "properties": {
+            "allowlistedDomains": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "blockedRefs": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "decision": {
+              "type": "string"
+            },
+            "riskClass": {
+              "type": "string"
+            },
+            "signals": {
+              "items": {
+                "additionalProperties": false,
+                "properties": {
+                  "detail": {
+                    "type": "string"
+                  },
+                  "kind": {
+                    "type": "string"
+                  },
+                  "origin": {
+                    "type": "string"
+                  },
+                  "stableRef": {
+                    "type": "string"
+                  }
+                },
+                "required": [
+                  "kind",
+                  "origin",
+                  "detail"
+                ],
+                "type": "object"
+              },
+              "type": "array"
+            },
+            "sourceRisk": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "decision",
+            "sourceRisk",
+            "riskClass",
+            "blockedRefs",
+            "signals"
+          ],
+          "type": "object"
+        },
+        "sessionState": {
+          "additionalProperties": false,
+          "properties": {
+            "currentUrl": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "mode": {
+              "type": "string"
+            },
+            "openedAt": {
+              "type": "string"
+            },
+            "policyProfile": {
+              "type": "string"
+            },
+            "sessionId": {
+              "type": "string"
+            },
+            "snapshotIds": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "status": {
+              "type": "string"
+            },
+            "updatedAt": {
+              "type": "string"
+            },
+            "version": {
+              "type": "string"
+            },
+            "visitedUrls": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "workingSetRefs": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            }
+          },
+          "required": [
+            "version",
+            "sessionId",
+            "mode",
+            "status",
+            "policyProfile",
+            "openedAt",
+            "updatedAt",
+            "visitedUrls",
+            "snapshotIds"
+          ],
+          "type": "object"
+        }
+      },
+      "required": [
+        "policy",
+        "sessionState"
+      ],
+      "type": "object"
+    },
+    "sessionId": {
+      "type": "string"
+    },
+    "sessionState": {
+      "additionalProperties": false,
+      "properties": {
+        "currentUrl": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "mode": {
+          "type": "string"
+        },
+        "openedAt": {
+          "type": "string"
+        },
+        "policyProfile": {
+          "type": "string"
+        },
+        "sessionId": {
+          "type": "string"
+        },
+        "snapshotIds": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "status": {
+          "type": "string"
+        },
+        "updatedAt": {
+          "type": "string"
+        },
+        "version": {
+          "type": "string"
+        },
+        "visitedUrls": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "workingSetRefs": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "version",
+        "sessionId",
+        "mode",
+        "status",
+        "policyProfile",
+        "openedAt",
+        "updatedAt",
+        "visitedUrls",
+        "snapshotIds"
+      ],
+      "type": "object"
+    },
+    "tabId": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

First observedv0.1.11Apr 15, 2026

TDQS

B3.3/5.0

Behavior2/5

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

No annotations exist, so the description must fully convey behavior. It only states 'Return the policy evaluation,' which is a read operation, but does not disclose potential side effects, authentication needs, rate limits, or other behavioral traits. This is insufficient for a tool with 7 parameters.

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?

The description is a single, front-loaded sentence with no wasted words. Every element contributes to the purpose, making it efficiently concise.

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, reducing the need to explain return values. However, the description lacks context about 'policy evaluation' or 'daemon tab,' and given the tool's complexity (7 parameters), a more detailed explanation of its use case would improve completeness.

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%, so the baseline is 3. The description adds no extra meaning beyond the schema; it does not elaborate on how parameters like target, browser, or sourceRisk are used in context.

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?

The description clearly states the tool returns a policy evaluation for a target or daemon tab, specifying the surface (public docs/research web). While it is specific, it does not differentiate from sibling tools, which all have distinct names but overlapping domains.

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?

The description implies usage for policy evaluation on the public docs/research web surface, but it provides no explicit guidance on when to use this tool versus alternatives, nor any exclusions or prerequisites.

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