AI agents call scan-dicom-directory to retrieve information from DICOM-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs directory scanning and metadata organization (grouping DICOM files into series), which is a read-only operation that retrieves and organizes existing data without creating, modifying, or deleting files. This is consistent with the 'Read' category for data retrieval and queries with no side effects.
From the tool's definition Tool description states 'Scan a directory for DICOM files and organize them into series' — a scanning and organization operation with no modification or deletion of data.
Attacks that exploit this kind of access
Scan a directory for DICOM files and organize them into series. It is categorised as a Read tool in the DICOM-MCP MCP Server, which means it retrieves data without modifying state.
Register the DICOM- MCP server in PolicyLayer and add a rule for scan-dicom-directory: 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 DICOM-MCP. Nothing to install.
scan-dicom-directory 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 scan-dicom-directory 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 scan-dicom-directory. 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.
scan-dicom-directory is provided by the DICOM- MCP server (shaunporwal/dicom-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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