Read an image or audio file. Returns the base64 encoded data and MIME type.
AI agents call read_media_file to retrieve information from Server Sequential Thinking without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and returns media file contents without creating, modifying, deleting, or executing anything. It is a straightforward read operation with minimal risk—the main exposure is inadvertent disclosure of file contents if the AI agent accesses unintended media files, but this is mitigated by typical filesystem access controls.
From the tool's definition Tool name is 'read_media_file' and description states it 'Read[s] an image or audio file' and 'Returns the base64 encoded data and MIME type.' The verb 'read' and the return-only behavior (base64 data and metadata) indicate data retrieval with no…
Attacks that exploit this kind of access
Read an image or audio file. Returns the base64 encoded data and MIME type. It is categorised as a Read tool in the Server Sequential Thinking MCP Server, which means it retrieves data without modifying state.
Register the Server Sequential Thinking MCP server in PolicyLayer and add a rule for read_media_file: 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 Server Sequential Thinking. Nothing to install.
read_media_file 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 read_media_file 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 read_media_file. 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.
read_media_file is provided by the Server Sequential Thinking MCP server (@modelcontextprotocol/server-sequential-thinking). 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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