Retrieve a blob and its metadata by name.
AI agents call get_blob to retrieve information from BlobGuard MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a query-like read operation to fetch stored blob data and associated metadata. It does not modify, delete, or execute anything; it only retrieves information. The lightweight blob storage context and use case (managing code edits) further confirm this is a safe read-only operation with minimal blast radius if accessed inappropriately.
From the tool's definition Tool description states 'Retrieve a blob and its metadata by name' — a retrieval operation with no side effects.
Attacks that exploit this kind of access
Retrieve a blob and its metadata by name. It is categorised as a Read tool in the BlobGuard MCP MCP Server, which means it retrieves data without modifying state.
Register the BlobGuard MCP server in PolicyLayer and add a rule for get_blob: 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 BlobGuard MCP. Nothing to install.
get_blob 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 get_blob 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 get_blob. 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.
get_blob is provided by the BlobGuard MCP server (voidious/blobguard-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.
Teams ship this data inside their own products. See what a licence covers →