获取 OSS 图片上传凭证。返回 accessid/host/policy/signature 等字段，用于 multipart/form-data POST 上传图片到阿里云 OSS。上传成功后获取 image_id，再用 save_note 创建图片笔记。⚠️ mime_type 必须与实际文件格式一致，否则 OSS 签名失败。
AI agents call get_upload_token to retrieve information from GetNote 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 upload credentials/tokens (accessid, host, policy, signature) from the server — it is a read/fetch operation that returns authentication metadata. It does not itself upload files, create notes, or modify any data. The actual upload happens separately via a multipart POST to OSS. Severity is low as it only returns temporary credentials.
From the tool's definition 获取 OSS 图片上传凭证。返回 accessid/host/policy/signature 等字段
Documented attack patterns abuse exactly the kind of access get_upload_token gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and GetNote MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_upload_token:
{
"version": "1",
"default": "deny",
"tools": {
"get_upload_token": {}
}
}get_upload_token is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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获取 OSS 图片上传凭证。返回 accessid/host/policy/signature 等字段，用于 multipart/form-data POST 上传图片到阿里云 OSS。上传成功后获取 image_id，再用 save_note 创建图片笔记。⚠️ mime_type 必须与实际文件格式一致，否则 OSS 签名失败。. It is categorised as a Read tool in the GetNote MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GetNote MCP Server MCP server in PolicyLayer and add a rule for get_upload_token: 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 GetNote MCP Server. Nothing to install.
get_upload_token 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_token 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_token. 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_token is provided by the GetNote MCP Server MCP server (iswalle/getnote-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from GetNote MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
26 GetNote MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.