Return per-channel histograms as lists (B, G, R or single 'gray').
AI agents call histogram_data to retrieve information from farshid-mcp-imageProcessing without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
histogram_data is a pure data retrieval tool that analyzes and returns statistical information about image pixel distributions. It performs no side effects, creates no new data, executes no code or commands, and cannot modify or delete data. This is a straightforward Read operation similar to image analysis queries.
From the tool's definition Tool returns histogram data from images as lists of per-channel values (B, G, R or gray). No modification, deletion, or execution of external operations occurs. The description explicitly states 'Return' indicating a read-only query operation.
Attacks that exploit this kind of access
Return per-channel histograms as lists (B, G, R or single 'gray'). It is categorised as a Read tool in the farshid-mcp-imageProcessing MCP Server, which means it retrieves data without modifying state.
Register the farshid-mcp-imageProcessing MCP server in PolicyLayer and add a rule for histogram_data: 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 farshid-mcp-imageProcessing. Nothing to install.
histogram_data 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 histogram_data 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 histogram_data. 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.
histogram_data is provided by the farshid-mcp-imageProcessing MCP server (pirahansiah/farshid-mcp-imageprocessing). 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.
Teams ship this data inside their own products. See what a licence covers →