x_federation_channel_grant
Grant a member access to a private channel by sealing its key to their pubkey with NIP-44 (ECDH), published as a ChannelGrant event only they can open. Use when adding a participant to an existing private channel. Publishing the raw key into a channel or a chat is wrong: it is a bearer secret, an...
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What x_federation_channel_grant does on Claude Flow
AI agents use x_federation_channel_grant to create or update resources in Claude Flow, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Claude Flow environment.
Why x_federation_channel_grant is rated Medium
Grants channel access by publishing encrypted key event, modifying access control irreversibly.
From the tool's definition Grant a member access to a private channel by sealing its key
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
The rule that runs x_federation_channel_grant safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Claude Flow, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For x_federation_channel_grant, this is the rule to start with:
x_federation_channel_grant stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Claude Flow, apply this rule, and every x_federation_channel_grant call is checked against it from then on.
Questions about x_federation_channel_grant
Grant a member access to a private channel by sealing its key to their pubkey with NIP-44 (ECDH), published as a ChannelGrant event only they can open. Use when adding a participant to an existing private channel. Publishing the raw key into a channel or a chat is wrong: it is a bearer secret, and anyone who sees it can read every past and future message, because there is no revocation. It is categorised as a Write tool in the Claude Flow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Claude Flow MCP server in PolicyLayer and add a rule for x_federation_channel_grant: 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 Claude Flow. Nothing to install.
x_federation_channel_grant is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the x_federation_channel_grant 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.
Set action: deny in the PolicyLayer policy for x_federation_channel_grant. 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.
x_federation_channel_grant is provided by the Claude Flow MCP server (claude-flow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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