AI agents call imageInfo to retrieve information from Tencent Cloud COS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves image information from Tencent Cloud COS, performing a query/read operation on stored image data. There are no side effects, data modifications, deletions, or external operations triggered. The blast radius of misuse is minimal—an attacker could only gain access to image metadata they can already reference, not modify or destroy data, nor execute code or move money.
From the tool's definition Tool name 'imageInfo' and description '图片处理-获取图片信息' (image processing - get image information) indicates retrieval of image metadata/properties without modification or deletion.
Documented attack patterns abuse exactly the kind of access imageInfo gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Tencent Cloud COS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for imageInfo:
{
"version": "1",
"default": "deny",
"tools": {
"imageInfo": {}
}
}imageInfo is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
图片处理-获取图片信息. It is categorised as a Read tool in the Tencent Cloud COS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tencent Cloud COS MCP Server MCP server in PolicyLayer and add a rule for imageInfo: 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 Tencent Cloud COS MCP Server. Nothing to install.
imageInfo 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 imageInfo 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 imageInfo. 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.
imageInfo is provided by the Tencent Cloud COS MCP Server MCP server (tencent/cos-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 21 Tencent Cloud COS MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
21 Tencent Cloud COS MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.