API Acre

web.robots-sitemap

Read-onlyIdempotent

Inspect a domain's robots.txt crawl rules and XML sitemap health, availability, and URL count.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`url`	Yes

Output Schema

TableJSON Schema

Name	Required	Description
`data`	Yes	Structured Robots and sitemap audit result
`meta`	Yes
`service`	Yes
`version`	Yes
`request_id`	Yes	Unique request identifier

Schema Changelog

Changes observed during successful MCP inspections.

Changed7 schema fields changedAug 17, 2026

addedOutput schema / properties / meta / properties / next_actions / items / properties / checkout_path
```
Added value: +{
+  "pattern": "^/try/",
+  "type": "string"
+}
```
addedOutput schema / properties / meta / properties / next_actions / items / properties / executes_automatically
```
Added value: +{
+  "const": false,
+  "type": "boolean"
+}
```

addedOutput schema / properties / meta / properties / next_actions / items / properties / handoff_path

Added value: +{
+  "description": "Free full contract and spend-capped command handoff; reading it does not execute or purchase the follow-up.",
+  "pattern": "^/catalog/",
+  "type": "string"
+}

addedOutput schema / properties / meta / properties / next_actions / items / properties / handoff_payment_required
```
Added value: +{
+  "const": false,
+  "type": "boolean"
+}
```
addedOutput schema / properties / meta / properties / next_actions / items / properties / maximum_atomic_usdc
```
Added value: +{
+  "pattern": "^[1-9][0-9]*$",
+  "type": "string"
+}
```
addedOutput schema / properties / meta / properties / next_actions / items / properties / sample_path
```
Added value: +{
+  "pattern": "^/samples/",
+  "type": [
+    "string",
+    "null"
+  ]
+}
```

changedOutput schema / properties / meta / properties / next_actions / items / required

Previous value: -[
-  "service",
-  "title",
-  "reason",
-  "method",
-  "path",
-  "price",
-  "input_template",
-  "use_output",
-  "authorization_required"
-]New value: +[
+  "service",
+  "title",
+  "reason",
+  "method",
+  "path",
+  "price",
+  "input_template",
+  "use_output",
+  "handoff_path",
+  "checkout_path",
+  "sample_path",
+  "maximum_atomic_usdc",
+  "handoff_payment_required",
+  "executes_automatically",
+  "authorization_required"
+]

Changed2 schema fields changedAug 11, 2026

addedOutput schema / properties / meta / properties / next_actions

Added value: +{
+  "description": "Optional separately priced follow-up calls. Each action requires a new payment challenge and explicit buyer authorization.",
+  "items": {
+    "properties": {
+      "authorization_required": {
+        "const": true,
+        "type": "boolean"
+      },
+      "input_template": {
+        "description": "Client-side template only: $request refers to the original input, $result to this response, and $json(...) serializes its argument. The server does not execute the follow-up.",
+        "type": "object"
+      },
+      "method": {
+        "const": "POST",
+        "type": "string"
+      },
+      "path": {
+        "pattern": "^/v1/",
+        "type": "string"
+      },
+      "price": {
+        "pattern": "^\\$[0-9]+",
+        "type": "string"
+      },
+      "reason": {
+        "type": "string"
+      },
+      "service": {
+        "type": "string"
+      },
+      "title": {
+        "type": "string"
+      },
+      "use_output": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "service",
+      "title",
+      "reason",
+      "method",
+      "path",
+      "price",
+      "input_template",
+      "use_output",
+      "authorization_required"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

changedOutput schema / properties / meta / required

Previous value: -[
-  "duration_ms",
-  "cached",
-  "sources",
-  "warnings"
-]New value: +[
+  "duration_ms",
+  "cached",
+  "sources",
+  "warnings",
+  "next_actions"
+]

First observedAug 9, 2026

TDQS

A3.9/5.0

Behavior4/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds context beyond these by detailing what is inspected (robots.txt rules, sitemap health/availability/URL count), giving the agent a richer understanding of the tool's behavior without contradicting the annotations.

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, focused sentence that is front-loaded with the action verb and resource, with no redundant words or filler. Every part adds value.

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

Completeness4/5

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

For a simple single-parameter tool with an output schema, the description is largely adequate: it states what the tool does and the annotations cover safety. The only notable gap is the missing URL format guidance, but the overall context is sufficient for the tool's simplicity.

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

Parameters2/5

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

Schema description coverage is 0% for the only parameter 'url'. The description mentions 'a domain's' but does not clarify whether the URL should be a full URI, just a domain, or include protocol. This ambiguity is not compensated by the schema, so the agent may misuse the parameter.

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?

The description uses a specific verb 'Inspect' and identifies the exact resource: a domain's robots.txt crawl rules and XML sitemap health, availability, and URL count. This clearly distinguishes it from sibling web tools like web.links or web.metadata by focusing on robots.txt and sitemap specifics.

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 intended use is implied by the description: when you need to inspect robots.txt rules or sitemap health for a domain. However, it does not explicitly mention alternatives or when not to use this tool, so guidance is minimal beyond the stated purpose.

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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