This record as markdown: /tools/dev-forgesworn-bray/group-members.md
What group-members does on Nostr Bray
AI agents call group-members to retrieve information from Nostr Bray without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why group-members is rated Low
This tool performs a straightforward data retrieval operation (listing group members) with no side effects, no code execution, and no data modification. It falls squarely into the Read category. The severity is low because listing group members is a standard, non-sensitive operation on a Nostr social network—similar to viewing a public group roster. Confidence is high due to the clear and unambiguous description.
From the tool's definition Tool name 'group-members' and description 'List members of a NIP-29 group' indicate a query operation that retrieves and returns group membership data without modifying or deleting anything.
Attacks that exploit this kind of access
The rule that runs group-members 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 group-members, this is the rule to start with:
group-members is read-only, so it stays allowed. 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 group-members call is checked against it from then on.
Questions about group-members
List members of a NIP-29 group. It is categorised as a Read tool in the Nostr Bray MCP Server, which means it retrieves data without modifying state.
Register the Nostr Bray MCP server in PolicyLayer and add a rule for group-members: 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.
group-members is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the group-members 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 group-members. 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.
group-members 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.
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