List all drafts
AI agents call substack_get_drafts to retrieve information from Substack MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a list of draft posts without modifying, deleting, or executing any operations. It is a pure read operation that retrieves data from the Substack account. The blast radius is minimal—exposure only allows an attacker to enumerate existing drafts, which is a low-severity information disclosure.
From the tool's definition Tool name 'substack_get_drafts' and description 'List all drafts' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all drafts. It is categorised as a Read tool in the Substack MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Substack MCP Server MCP server in PolicyLayer and add a rule for substack_get_drafts: 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 Substack MCP Server. Nothing to install.
substack_get_drafts 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 substack_get_drafts 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 substack_get_drafts. 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.
substack_get_drafts is provided by the Substack MCP Server MCP server (jessicaruthabbott/my-substack-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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