AI agents call get_upload_status to retrieve information from Yadisk without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves status information about an ongoing upload process. It does not create, modify, delete, or execute any operations. It is a read-only query operation that has no impact on data or system state.
From the tool's definition Tool name is 'get_upload_status' and description states it 'Check[s] the status of a background upload' — a pure query/monitoring operation with no side effects.
Attacks that exploit this kind of access
Check the status of a background upload started with upload_local_file_background. It is categorised as a Read tool in the Yadisk MCP Server, which means it retrieves data without modifying state.
Register the Yadisk MCP server in PolicyLayer and add a rule for get_upload_status: 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 Yadisk. Nothing to install.
get_upload_status 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_upload_status 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_upload_status. 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_upload_status is provided by the Yadisk MCP server (patr56/yadisk-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.
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