get_addon_info
on npm:@heroku/mcp-server@1.2.2
Severity
2 findings on this tool
- mediumunconstrained inputf-r1-get_addon_info
Tool `get_addon_info` accepts unconstrained string input
The following string parameter(s) have no `maxLength` constraint: `addon`, `app`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.
fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.
OWASP LLM01NIST MEASURE-2.3ATLAS T0051 - mediumexcessive agencyf-r5-get_addon_info
Tool `get_addon_info` description mentions money but no `money` side-effect is declared
Description: "Get add-on details: plan, state, billing" -- this references money/payment/refund/etc., but the declared side_effects ([]) don't include `money`. A capframe-bind policy that relies on declared side_effects to scope spend caveats will under-scope this tool.
fix: Add `money` to the tool's `side_effects` declaration, or rewrite the description to clarify that no actual money moves.
OWASP LLM08NIST MEASURE-2.6ATLAS T0040
About this tool
get_addon_info is one of 33 tools exposed by Heroku MCP. The server scored 8/100 overall against the capframe rule engine (source: sandbox). Last scanned 2026-06-05.
The findings above are emitted by the public capframe.findings.v1 schema. Disagree with one? Open an issue.