Whisper

topAsnsByPrefixCount

whisper_topAsnsByPrefixCount

Read-only

Top ASNs ranked by announced-prefix count. Answers without an API key. Example call: {"skill":"topAsnsByPrefixCount","input":10}

Input Schema

TableJSON Schema

Name	Required	Description	Default
`input`	Yes	A row limit. The example passes 10.

Output Schema

TableJSON Schema

Name	Required	Description
`rows`	Yes	The answers, one object per row, keyed by the column names above. An empty array means the question was understood and nothing matched, which is an answer and not a failure.
`columns`	Yes	The column names, in order. Every row object has exactly these keys, so this is the row shape and reading it is cheaper than inspecting a row.
`statistics`	No	What the query cost.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 25, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "description": "A tabular graph answer: the column names, the rows keyed by them, and the cost.",
+  "properties": {
+    "columns": {
+      "description": "The column names, in order. Every row object has exactly these keys, so this is the row shape and reading it is cheaper than inspecting a row.",
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "rows": {
+      "description": "The answers, one object per row, keyed by the column names above. An empty array means the question was understood and nothing matched, which is an answer and not a failure.",
+      "items": {
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "statistics": {
+      "description": "What the query cost.",
+      "properties": {
+        "executionTimeMs": {
+          "description": "Milliseconds the graph spent answering.",
+          "type": "integer"
+        },
+        "rowCount": {
+          "description": "How many rows came back.",
+          "type": "integer"
+        }
+      },
+      "required": [
+        "rowCount"
+      ],
+      "type": "object"
+    }
+  },
+  "required": [
+    "columns",
+    "rows"
+  ],
+  "type": "object"
+}

AddedSep 25, 2026
RemovedSep 25, 2026
AddedSep 25, 2026

TDQS

A4.3/5.0

Behavior4/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false, covering the safety profile. The description adds useful context that no API key is required, which is beyond the annotations. It doesn't go into return format or pagination, but the output schema exists to cover that.

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 exceptionally concise—two sentences—and front-loads the core purpose. Every word earns its place, and the example call is compact and illustrative. No filler or redundant phrasing.

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?

For a simple read-only tool with one parameter and an output schema, the description is complete. It states the purpose, notes the no-API-key requirement, and provides a concrete example. Safety and parameter details are handled by annotations and schema, leaving no critical gaps.

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 100% and the schema description for 'input' already states 'A row limit' with an example. The description's example call repeats this without adding new semantic detail. The parameter is fully documented by the schema, so a baseline 3 is appropriate.

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 clearly states the verb 'Top' and the resource 'ASNs' ranked by 'announced-prefix count'. It distinguishes this from sibling tools, which cover different functions like assess, lookup, etc. The purpose is immediately unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides clear context by noting 'Answers without an API key', which informs the agent about prerequisites. It also gives an explicit example call. However, it does not mention when not to use this tool or alternatives, so it falls short of a 5.

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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