tailscale-blade-mcp

ts_acl

Displays your Tailscale ACL policy summary, including groups, rules, SSH rules, and tag owners, to show who can talk to whom.

Instructions

ACL policy summary: groups, rules, SSH rules, tag owners. Shows who can talk to whom.

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": "ts_acl"
  }
}

Input Schema

Name	Required	Description	Default
No arguments

Output Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.9.0Jun 25, 2026

TDQS

A4.3/5.0

Behavior3/5

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

With no annotations provided, the description carries the full burden. It indicates the tool is read-only ('shows'), but it does not disclose other behavioral traits such as authentication needs, rate limits, or behavior when no ACL exists. It provides basic transparency but lacks depth.

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, efficient sentence with no wasted words. It front-loads the key information and is easily parseable.

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?

Given the tool requires no parameters and has an output schema (not shown but indicated), the description is complete enough. It covers the purpose and scope without needing elaboration.

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?

The input schema has zero parameters with 100% coverage, so the description does not need to explain any parameters. It correctly implies no additional input is required.

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 tool's purpose as summarizing ACL policy including groups, rules, SSH rules, and tag owners. It uses a specific verb ('shows') and resource ('ACL policy summary'), and it distinguishes itself from sibling tools like ts_acl_set and ts_acl_validate by indicating it is read-only for viewing.

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 implies usage for viewing ACL policy summaries, and the context of sibling tools (e.g., ts_acl_set for modifying) provides implicit guidance. However, it lacks explicit when-to-use or when-not-to-use instructions.

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