files_upload

SERVERDialogbrain SOURCEhttps://api.dialogbrain.com/mcp

Medium RISK CLASS

Category Write

Parameters 50 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-saloprj-dialogbrain/files-upload.md

WHAT IT DOES

What files_upload does on Dialogbrain

AI agents use files_upload to create or update resources in Dialogbrain, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Dialogbrain environment.

Parameter	Type	Required	Description
`title`	string	—	Optional display title
`content`	string	—	Base64-encoded file bytes. Either content OR source_url is required.
`filename`	string	—	Filename with extension (e.g. 'photo.png')
`mime_type`	string	—	MIME type (e.g. 'image/png', 'application/pdf')
`source_url`	string	—	Public URL to fetch file from. Either content OR source_url is required.

Parameters from the server's own tool schema.

RISK

Why files_upload is rated Medium

This tool creates/stores new data (file upload) reversibly within DialogBrain. It does not execute arbitrary operations, delete data, or move money. The blast radius is medium because an agent could upload unwanted files, consuming storage or potentially uploading sensitive/malicious content for distribution via messages, but the action is recoverable through deletion.

From the tool's definition Tool description states 'Upload a file to DialogBrain and get a file_id for use in messages_send' — this creates a new file record in the system that persists for later use in message attachments.

Risk signalsAccepts file system path (filename) · Accepts raw HTML/template content (content)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs files_upload 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_upload, this is the rule to start with:

files_upload Rate-limited

files_upload stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "files_upload": {
      "limits": [
        {
          "counter": "files_upload_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Dialogbrain, apply this rule, and every files_upload call is checked against it from then on.

FAQ

Questions about files_upload

What does the files_upload tool do? +

Upload a file to DialogBrain and get a file_id for use in messages_send. When to use: - User wants to send a file/image to a contact - Before calling messages_send with an attachment Returns: file_id (integer) to pass to messages_send attachments parameter. It is categorised as a Write tool in the Dialogbrain MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does files_upload accept? +

files_upload accepts 5 parameters: title, content, filename, mime_type, source_url. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on files_upload? +

Register the Dialogbrain MCP server in PolicyLayer and add a rule for files_upload: 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.

What risk level is files_upload? +

files_upload is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit files_upload? +

Yes. Add a rate_limit block to the files_upload 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.

How do I block files_upload completely? +

Set action: deny in the PolicyLayer policy for files_upload. 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.

What MCP server provides files_upload? +

files_upload 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.

KEEP EXPLORING

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