// MCP TOOL REFERENCE

SUBSTACK TOOLS

11 tools from the Substack MCP Server, categorised by risk level.

View the Substack policy →
// ALL 11 SUBSTACK TOOLS
READ 2 tools
Read get_draft Get full details of a specific draft, including the body content. Read list_drafts List recent drafts (unpublished posts).
WRITE 8 tools
Write unschedule_draft Cancel a scheduled publish, keeping the post as a draft. Write create_draft create_draft Write post_note post_note Write publish_draft publish_draft Write schedule_draft Schedule a draft to publish at a future datetime. Write set_cover_image set_cover_image Write update_draft update_draft Write upload_image Upload an image to Substack's CDN and return its public URL.
DESTRUCTIVE 1 tools
Destructive delete_draft Permanently delete a draft. This cannot be undone.

Route Substack through PolicyLayer and every one of its 11 tools is checked against your policy before it runs.

CHECK YOUR STACK →

See every tool, the dangerous ones, and the token cost across your stack.

// FAQ
How many tools does the Substack MCP server have? +

The Substack MCP server exposes 11 tools across 3 categories: Read, Write, Destructive.

How do I enforce policies on Substack tools? +

Route the Substack server through the PolicyLayer gateway. Define allow, deny, or approval rules per tool in the dashboard; they are enforced on every call before it reaches the server.

What risk categories do Substack tools fall into? +

Substack tools are categorised as Read (2), Write (8), Destructive (1). Each category has a recommended default policy.

Enforce policy on every Substack tool call.

Start from Substack, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →

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43,000+ MCP servers and 220,000+ tools scanned and risk-classified.

// GET IN TOUCH

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