files_info
Get metadata and download URLs for files by their IDs. When to use: - After messages_read_history returns attachment_file_ids - To get a presigned download URL to read a received file Returns: filename, mime_type, byte_size, download_url (1-hour presigned URL).
This record as markdown: /tools/io-github-saloprj-dialogbrain/files-info.md
What files_info does on Dialogbrain
AI agents call files_info to retrieve information from Dialogbrain without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
file_ids | array | Yes | List of file IDs (max 20) |
Parameters from the server's own tool schema.
Why files_info is rated Low
This tool performs a pure retrieval operation—it queries file metadata and generates presigned URLs for downloading existing files. No data is created, modified, deleted, or executed. The presigned URL is a read-only mechanism.
From the tool's definition Tool description states 'Get metadata and download URLs for files' and 'To get a presigned download URL to read a received file'. The operation retrieves file information and generates read-only URLs without modifying, deleting, or executing anything.
Attacks that exploit this kind of access
The rule that runs files_info safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Dialogbrain, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For files_info, this is the rule to start with:
files_info is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Dialogbrain, apply this rule, and every files_info call is checked against it from then on.
Questions about files_info
Get metadata and download URLs for files by their IDs. When to use: - After messages_read_history returns attachment_file_ids - To get a presigned download URL to read a received file Returns: filename, mime_type, byte_size, download_url (1-hour presigned URL). It is categorised as a Read tool in the Dialogbrain MCP Server, which means it retrieves data without modifying state.
files_info accepts 1 parameter: file_ids. Required: file_ids. The full parameter table on this page comes from the server's own tool schema.
Register the Dialogbrain MCP server in PolicyLayer and add a rule for files_info: 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 Dialogbrain. Nothing to install.
files_info 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 files_info 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 files_info. 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.
files_info is provided by the Dialogbrain MCP server (https://api.dialogbrain.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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