Automatically fix one specific code quality issue. Applies the SonarLint-suggested fix for the issue at the given file, line, and rule. The file is modified directly. To fix all issues in a file at once, use fix_all_issues instead.
AI agents use fix_issue to create or update resources in Sonarlint — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Sonarlint environment.
An AI agent can call fix_issue faster than any human can review — one bad instruction and it creates or modifies resources in Sonarlint by the hundred, each call as confident as the last.
Attacks that exploit this kind of access
Automatically fix one specific code quality issue. Applies the SonarLint-suggested fix for the issue at the given file, line, and rule. The file is modified directly. To fix all issues in a file at once, use fix_all_issues instead. It is categorised as a Write tool in the Sonarlint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Sonarlint MCP server in PolicyLayer and add a rule for fix_issue: 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 Sonarlint. Nothing to install.
fix_issue is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the fix_issue 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 fix_issue. 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.
fix_issue is provided by the Sonarlint MCP server (@nielspeter/sonarlint-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.