Compare two documents and see what fields differ. Useful for comparing draft vs published or two versions.
AI agents call sanity_diff to retrieve information from Sanity MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
sanity_diff performs a comparison between two documents and returns the differences. This is fundamentally a retrieval and analysis operation with no side effects—it does not create, modify, delete, or execute any operations. Even though it operates on a content management system with full CRUD capabilities (as noted in the server description), this specific tool only reads and compares existing data.
From the tool's definition Tool description states 'Compare two documents and see what fields differ' - this is a comparison/query operation that retrieves and displays differences without modifying any data. The verbs 'Compare' and 'see' indicate read-only operations.
Attacks that exploit this kind of access
Compare two documents and see what fields differ. Useful for comparing draft vs published or two versions. It is categorised as a Read tool in the Sanity MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Sanity MCP Server MCP server in PolicyLayer and add a rule for sanity_diff: 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 Sanity MCP Server. Nothing to install.
sanity_diff 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 sanity_diff 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 sanity_diff. 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.
sanity_diff is provided by the Sanity MCP Server MCP server (purple-horizons/sanity-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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