contacts-follow
Follow a Nostr pubkey. Fetches current contact list, adds the pubkey, publishes updated kind 3. If the list would shrink by >20%, returns a guarded warning — pass confirm: true to proceed.
This record as markdown: /tools/dev-forgesworn-bray/contacts-follow.md
What contacts-follow does on Nostr Bray
AI agents use contacts-follow to create or update resources in Nostr Bray, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Nostr Bray environment.
Why contacts-follow is rated Medium
This tool modifies the user's contact list by adding a new entry and publishing the updated list to the Nostr network. It is a reversible write operation (the pubkey can later be unfollowed). The guarded warning for shrinking lists suggests some safety awareness, but the core action is a social graph modification. Severity is medium because misuse could lead to unwanted follows or social graph manipulation at scale.
From the tool's definition Follow a Nostr pubkey. Fetches current contact list, adds the pubkey, publishes updated kind 3.
Attacks that exploit this kind of access
The rule that runs contacts-follow safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Nostr Bray, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For contacts-follow, this is the rule to start with:
contacts-follow 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 Nostr Bray, apply this rule, and every contacts-follow call is checked against it from then on.
Questions about contacts-follow
Follow a Nostr pubkey. Fetches current contact list, adds the pubkey, publishes updated kind 3. If the list would shrink by >20%, returns a guarded warning — pass confirm: true to proceed. It is categorised as a Write tool in the Nostr Bray MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Nostr Bray MCP server in PolicyLayer and add a rule for contacts-follow: 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 Nostr Bray. Nothing to install.
contacts-follow 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 contacts-follow 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 contacts-follow. 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.
contacts-follow is provided by the Nostr Bray MCP server (nostr-bray). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on Nostr Bray, and thousands of servers like it.
This server
Across the catalogue