AI agents call blob_delete to permanently remove resources in Flux MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes data (a blob) and cannot be undone. Deletion is irreversible, making it Destructive rather than Write. In a Kanban/project management context, blobs likely represent attached files or assets. An AI agent misusing this could maliciously or accidentally destroy important attachments or data, warranting high severity.
From the tool's definition Tool name is 'blob_delete' with description 'Delete a blob by ID'. The verb 'delete' combined with the irreversible action of removing a blob (file/binary large object) indicates data destruction.
Documented attack patterns abuse exactly the kind of access blob_delete gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Flux MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for blob_delete:
{
"version": "1",
"default": "deny",
"hide": [
"blob_delete"
]
}blob_delete disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Delete a blob by ID. It is categorised as a Destructive tool in the Flux MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Flux MCP Server MCP server in PolicyLayer and add a rule for blob_delete: 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 Flux MCP Server. Nothing to install.
blob_delete is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the blob_delete 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 blob_delete. 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.
blob_delete is provided by the Flux MCP Server MCP server (sirsjg/flux). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 25 Flux MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
25 Flux MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.