mastodon_defederate

Instance-wide defederation — admin-only. Uses the admin/domain_blocks endpoint with severity=suspend. QUEUED — requires operator confirmation in the Nest panel before firing.

SERVERCrow SOURCEkh0pper/crow

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/kh0pper-crow/mastodon-defederate.md

WHAT IT DOES

What mastodon_defederate does on Crow

AI agents call mastodon_defederate to retrieve information from Crow without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why mastodon_defederate is rated Low

Even though mastodon_defederate only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mastodon_defederate safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Crow, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For mastodon_defederate, this is the rule to start with:

mastodon_defederate Allowed

mastodon_defederate is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mastodon_defederate": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Crow, apply this rule, and every mastodon_defederate call is checked against it from then on.

FAQ

Questions about mastodon_defederate

What does the mastodon_defederate tool do? +

Instance-wide defederation — admin-only. Uses the admin/domain_blocks endpoint with severity=suspend. QUEUED — requires operator confirmation in the Nest panel before firing. It is categorised as a Read tool in the Crow MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on mastodon_defederate? +

Register the Crow MCP server in PolicyLayer and add a rule for mastodon_defederate: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Crow. Nothing to install.

What risk level is mastodon_defederate? +

mastodon_defederate is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit mastodon_defederate? +

Yes. Add a rate_limit block to the mastodon_defederate rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block mastodon_defederate completely? +

Set action: deny in the PolicyLayer policy for mastodon_defederate. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides mastodon_defederate? +

mastodon_defederate is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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