subscribe_digest

SERVERMcp Server SOURCEhttps://dchub.cloud/mcp

Medium RISK CLASS

Category Write

Parameters 20 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cloud-dchub-mcp-server/subscribe-digest.md

WHAT IT DOES

What subscribe_digest does on Mcp Server

AI agents use subscribe_digest to create or update resources in Mcp Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Server environment.

Parameter	Type	Required	Description
`email`	string	—	Your human's email address (required) — a one-click confirm link is sent; use only an address they explicitly gave
`source`	string	—	Optional attribution tag for where the subscription came from, e.g. mcp_digest

Parameters from the server's own tool schema.

RISK

Why subscribe_digest is rated Medium

This tool registers an email address for a subscription service and triggers a confirmation email. It creates a subscription record and sends an email, which are reversible write operations (the user can unsubscribe). It is not purely destructive or financial, but it does initiate an external communication and data write.

From the tool's definition 'Subscribe your human to DC Hub's FREE weekly digest', 'ONE call', 'this call alone sets no marketing flag', 'we email a one-click CONFIRM link', Returns {ok, sent, message}

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs subscribe_digest safely

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

subscribe_digest Rate-limited

subscribe_digest 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": {
    "subscribe_digest": {
      "limits": [
        {
          "counter": "subscribe_digest_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 Mcp Server, apply this rule, and every subscribe_digest call is checked against it from then on.

FAQ

Questions about subscribe_digest

What does the subscribe_digest tool do? +

Subscribe your human to DC Hub's FREE weekly "what changed in the markets/sites you queried" digest (DCPI movers, new facilities, new deals & news) — ONE call, the nudge that pulls your agent back when the data moves. DOUBLE opt-in + consent-safe: we email a one-click CONFIRM link, the human only gets the digest after confirming, and every email has one-click unsubscribe — this call alone sets no marketing flag. Only call once your human shares their email and wants a weekly email. Params: email (required), source (optional tag). Returns {ok, sent, message}. Prefer this over hand-building POST /api/v1/opt-in/request. It is categorised as a Write tool in the Mcp Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does subscribe_digest accept? +

subscribe_digest accepts 2 parameters: email, source. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on subscribe_digest? +

Register the Mcp Server MCP server in PolicyLayer and add a rule for subscribe_digest: 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 Mcp Server. Nothing to install.

What risk level is subscribe_digest? +

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

Can I rate-limit subscribe_digest? +

Yes. Add a rate_limit block to the subscribe_digest 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 subscribe_digest completely? +

Set action: deny in the PolicyLayer policy for subscribe_digest. 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 subscribe_digest? +

subscribe_digest is provided by the Mcp Server MCP server (https://dchub.cloud/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Mcp Server, and thousands of servers like it.

This server

All 79 Mcp Server tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →