cs_code_action
List the code actions (quick fixes / refactors) OmniSharp offers for a range — the lightbulb menu. Read-only: returns the available actions (title, kind, whether each carries a WorkspaceEdit or a Command) without applying any. Unlike Godot's GDScript server, OmniSharp implements code actions, so ...
This record as markdown: /tools/breakpoint-mcp/cs-code-action.md
What cs_code_action does on Breakpoint
AI agents invoke cs_code_action to trigger actions in Breakpoint. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
| Parameter | Type | Required | Description |
|---|---|---|---|
only | array | — | Restrict to these CodeActionKind prefixes, e.g. 'quickfix', 'refactor' |
path | string | Yes | C# script path (res://..., absolute, or relative to the C# project root) |
end_line | integer | — | 0-based end line (default = start_line) |
start_line | integer | Yes | 0-based start line |
end_character | integer | — | 0-based end character (default = start_character) |
start_character | integer | Yes | 0-based start character |
Parameters from the server's own tool schema.
Why cs_code_action is rated High
cs_code_action triggers real processes with real consequences. An agent gone sideways doesn't fire it once. It starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.
Risk signalsAccepts file system path (path)
Attacks that exploit this kind of access
The rule that runs cs_code_action safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Breakpoint, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For cs_code_action, this is the rule to start with:
cs_code_action stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Breakpoint, apply this rule, and every cs_code_action call is checked against it from then on.
Questions about cs_code_action
List the code actions (quick fixes / refactors) OmniSharp offers for a range — the lightbulb menu. Read-only: returns the available actions (title, kind, whether each carries a WorkspaceEdit or a Command) without applying any. Unlike Godot's GDScript server, OmniSharp implements code actions, so this returns real results; it stays feature-detected (with a -32601 belt-and-suspenders) so a server that lacks it degrades gracefully. end_line/end_character default to the start position (a caret, not a selection). It is categorised as a Execute tool in the Breakpoint MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
cs_code_action accepts 6 parameters: only, path, end_line, start_line, end_character, start_character. Required: path, start_line, start_character. The full parameter table on this page comes from the server's own tool schema.
Register the Breakpoint MCP server in PolicyLayer and add a rule for cs_code_action: 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 Breakpoint. Nothing to install.
cs_code_action is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the cs_code_action 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 cs_code_action. 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.
cs_code_action is provided by the Breakpoint MCP server (breakpoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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