dm-send

SERVERNostr Bray SOURCEnostr-bray

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dev-forgesworn-bray/dm-send.md

WHAT IT DOES

What dm-send does on Nostr Bray

AI agents use dm-send 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.

RISK

Why dm-send is rated Medium

dm-send creates and persists a new encrypted message on the Nostr network. This is reversible (messages can be deleted or superseded) and has no destructive or financial impact. It is a Write operation rather than Execute because it does not run arbitrary code or trigger external operations based on message content—it simply delivers a crafted message.

From the tool's definition The tool description states 'Send an encrypted direct message' which creates a new message artifact in the Nostr network. This is a write operation that creates/modifies data reversibly.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs dm-send 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 dm-send, this is the rule to start with:

dm-send Rate-limited

dm-send 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "dm-send": {
      "limits": [
        {
          "counter": "dm-send_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Nostr Bray, apply this rule, and every dm-send call is checked against it from then on.

FAQ

Questions about dm-send

What does the dm-send tool do? +

Send an encrypted direct message. Accepts any identifier: name, NIP-05, npub, or hex pubkey. Default: NIP-17 gift wrap (most private). Set nip04: true for legacy NIP-04 (only if NIP04_ENABLED=1). Use dm-by-name to search your contacts if you are unsure of the exact identity. 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.

How do I enforce a policy on dm-send? +

Register the Nostr Bray MCP server in PolicyLayer and add a rule for dm-send: 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.

What risk level is dm-send? +

dm-send is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit dm-send? +

Yes. Add a rate_limit block to the dm-send 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 dm-send completely? +

Set action: deny in the PolicyLayer policy for dm-send. 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 dm-send? +

dm-send 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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