Medium Risk

generate_installable_artifact_upload_url

Generates a signed upload url valid for 1 hour for an installable artifact to be uploaded to Bitrise Release Management. The response will contain an url that can be used to upload an artifact to Bitrise Release Management using a simple curl request with the file data that should be uploaded. Th...

Part of the Bitrise server.

generate_installable_artifact_upload_url can modify Bitrise data, with no limits today. PolicyLayer puts allow, deny, and rate-limit rules on every call. Live in minutes.

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AI agents use generate_installable_artifact_upload_url to create or modify resources in Bitrise. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

Without a policy, an AI agent could call generate_installable_artifact_upload_url repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Bitrise.

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_installable_artifact_upload_url": {
      "limits": [
        {
          "counter": "generate_installable_artifact_upload_url_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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These attack patterns abuse exactly the kind of access generate_installable_artifact_upload_url gives an agent. Each links to the full case and the policy that stops it:

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Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so generate_installable_artifact_upload_url only ever does what you allow.

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Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.

What does the generate_installable_artifact_upload_url tool do? +

Generates a signed upload url valid for 1 hour for an installable artifact to be uploaded to Bitrise Release Management. The response will contain an url that can be used to upload an artifact to Bitrise Release Management using a simple curl request with the file data that should be uploaded. The necessary headers and http method will also be in the response. This artifact will need to be processed after upload to be usable. The status of processing can be checked by making another request to a different url giving back the processed status of an installable artifact.. It is categorised as a Write tool in the Bitrise MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_installable_artifact_upload_url? +

Register the Bitrise MCP server in PolicyLayer and add a rule for generate_installable_artifact_upload_url: 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 Bitrise. Nothing to install.

What risk level is generate_installable_artifact_upload_url? +

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

Can I rate-limit generate_installable_artifact_upload_url? +

Yes. Add a rate_limit block to the generate_installable_artifact_upload_url 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 generate_installable_artifact_upload_url completely? +

Set action: deny in the PolicyLayer policy for generate_installable_artifact_upload_url. 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 generate_installable_artifact_upload_url? +

generate_installable_artifact_upload_url is provided by the Bitrise MCP server (https://mcp.bitrise.io/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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