read_file_base64
A read tool on the Mapi Agent Memory MCP server.
This record as markdown: /tools/mapi-agent-memory/read-file-base64.md
What read_file_base64 does on Mapi Agent Memory
AI agents call read_file_base64 to retrieve information from Mapi Agent Memory without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why read_file_base64 is rated Low
The tool's name unambiguously indicates data retrieval (read_file_base64). It retrieves file content encoded in base64, which is a Read category operation. Severity is medium rather than low because the sibling tools suggest this server manages sensitive agent memory, governance records, and audit trails—data whose exposure could compromise agent behavior oversight or reveal sensitive operational details.
From the tool's definition Tool name 'read_file_base64' explicitly indicates file reading functionality. The server context emphasizes 'memory and governance for AI agents', suggesting files contain sensitive agent memory, audit logs, or control data. Empty description limits precision.
Attacks that exploit this kind of access
The rule that runs read_file_base64 safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mapi Agent Memory, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For read_file_base64, this is the rule to start with:
read_file_base64 is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Mapi Agent Memory, apply this rule, and every read_file_base64 call is checked against it from then on.
Questions about read_file_base64
read_file_base64 is a read tool on the Mapi Agent Memory MCP server. It is categorised as a Read tool in the Mapi Agent Memory MCP Server, which means it retrieves data without modifying state.
Register the Mapi Agent Memory MCP server in PolicyLayer and add a rule for read_file_base64: 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 Mapi Agent Memory. Nothing to install.
read_file_base64 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_file_base64 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_file_base64. 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_file_base64 is provided by the Mapi Agent Memory MCP server (cabo0m/mapi-agent-memory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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