perseus

perseus_perseus

Read-only

Fetch rendered context from a remote Perseus instance by URL to pull live workspace state for read-only access and caching.

Instructions

Fetch rendered context from a remote Perseus instance by URL. Use to pull live workspace state from another machine or container. Read-only; caches results — re-fetch when remote state may have changed.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "perseus_perseus"
  }
}

Input Schema

Name	Required	Description	Default
`url`	No	URL of the remote Perseus instance to fetch context from

Output Schema

Name	Required	Description	Default
`rendered`	No	Remote Perseus context as markdown
`source_url`	No	URL of the remote Perseus instance

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedv1.0.10Jun 27, 2026

removedInput schema / properties / args

Removed value: -{
-  "description": "Arguments for @perseus directive",
-  "type": "string"
-}

addedInput schema / properties / url

Added value: +{
+  "description": "URL of the remote Perseus instance to fetch context from",
+  "type": "string"
+}

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "rendered": {
+      "description": "Remote Perseus context as markdown",
+      "type": "string"
+    },
+    "source_url": {
+      "description": "URL of the remote Perseus instance",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

First observedv0.1.0May 27, 2026

TDQS

A4/5.0

Behavior4/5

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

Annotations already indicate readOnlyHint=true. The description adds value by disclosing caching behavior ('caches results — re-fetch when remote state may have changed'), which is not in 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?

Two sentences efficiently convey purpose and usage. No wasted words; front-loaded with the core action.

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?

With one parameter, an output schema (present), and readOnlyHint annotation, the description covers key aspects. The caching note adds important context for agent decision-making.

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% for the single parameter 'url', which has a clear description. The tool description also mentions 'by URL', reinforcing the parameter's purpose. No additional semantic depth needed.

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 verb 'Fetch' and the resource 'rendered context from a remote Perseus instance by URL'. It implies a specific use case distinct from sibling tools that likely operate locally, but does not explicitly differentiate.

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 explicitly states when to use ('pull live workspace state from another machine or container') and provides a caching note with re-fetch advice. It lacks explicit 'when not to use' or alternative tool names.

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