postmark_get_message_stream

A read tool on the Integrations MCP server.

SERVERIntegrations MCP SOURCEshriram-vasudevan/integrations-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/shriram-vasudevan-integrations-mcp/postmark-get-message-stream.md

WHAT IT DOES

What postmark_get_message_stream does on Integrations MCP

AI agents call postmark_get_message_stream to retrieve information from Integrations MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why postmark_get_message_stream is rated Low

The 'get' prefix strongly indicates a read-only data retrieval operation. Even with an empty description, the naming convention and context of Postmark (transactional email service) suggest this fetches message stream metadata or logs. This poses minimal risk as it only accesses existing data without side effects. Confidence is moderate due to the empty description, but the verb semantics are clear.

From the tool's definition Tool name 'postmark_get_message_stream' uses 'get' verb, indicating a retrieval operation. Postmark is an email delivery service; 'get_message_stream' retrieves message stream data without modifying it.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs postmark_get_message_stream safely

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

postmark_get_message_stream Allowed

postmark_get_message_stream is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "postmark_get_message_stream": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Integrations MCP, apply this rule, and every postmark_get_message_stream call is checked against it from then on.

FAQ

Questions about postmark_get_message_stream

What does the postmark_get_message_stream tool do? +

postmark_get_message_stream is a read tool on the Integrations MCP server. It is categorised as a Read tool in the Integrations MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on postmark_get_message_stream? +

Register the Integrations MCP server in PolicyLayer and add a rule for postmark_get_message_stream: 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 Integrations MCP. Nothing to install.

What risk level is postmark_get_message_stream? +

postmark_get_message_stream is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit postmark_get_message_stream? +

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

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

postmark_get_message_stream is provided by the Integrations MCP server (shriram-vasudevan/integrations-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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