Generate a caption for an image or video. Accepts a URL or local file path.
AI agents call caption to retrieve information from Perceptron Vision MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and processes visual information to produce a textual summary. No data is created, modified, deleted, or irreversibly changed. No code is executed, no financial transactions occur, and no external side effects are triggered beyond the inference operation itself. This is a straightforward Read operation.
From the tool's definition Tool description states it 'Generate[s] a caption for an image or video' by accepting 'a URL or local file path.' Caption generation is a read-only operation that analyzes visual content and returns descriptive text without modifying, deleting, or executing…
Attacks that exploit this kind of access
Generate a caption for an image or video. Accepts a URL or local file path. It is categorised as a Read tool in the Perceptron Vision MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Perceptron Vision MCP Server MCP server in PolicyLayer and add a rule for caption: 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 Perceptron Vision MCP Server. Nothing to install.
caption 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 caption 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 caption. 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.
caption is provided by the Perceptron Vision MCP Server MCP server (perceptron-ai-inc/mcp-server). 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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