diff --git a/src/agents/tools/common.ts b/src/agents/tools/common.ts
index 19cca2d7927..81d3f4efc00 100644
--- a/src/agents/tools/common.ts
+++ b/src/agents/tools/common.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs/promises";
 import type { AgentTool, AgentToolResult } from "@mariozechner/pi-agent-core";
 import { detectMime } from "../../media/mime.js";
+import { readSnakeCaseParamRaw } from "../../param-key.js";
 import type { ImageSanitizationLimits } from "../image-sanitization.js";
 import { sanitizeToolResultImages } from "../tool-images.js";
 
@@ -53,22 +54,8 @@ export function createActionGate<T extends Record<string, boolean | undefined>>(
   };
 }
 
-function toSnakeCaseKey(key: string): string {
-  return key
-    .replace(/([A-Z]+)([A-Z][a-z])/g, "$1_$2")
-    .replace(/([a-z0-9])([A-Z])/g, "$1_$2")
-    .toLowerCase();
-}
-
 function readParamRaw(params: Record<string, unknown>, key: string): unknown {
-  if (Object.hasOwn(params, key)) {
-    return params[key];
-  }
-  const snakeKey = toSnakeCaseKey(key);
-  if (snakeKey !== key && Object.hasOwn(params, snakeKey)) {
-    return params[snakeKey];
-  }
-  return undefined;
+  return readSnakeCaseParamRaw(params, key);
 }
 
 export function readStringParam(
diff --git a/src/param-key.ts b/src/param-key.ts
new file mode 100644
index 00000000000..9b86eccfc1b
--- /dev/null
+++ b/src/param-key.ts
@@ -0,0 +1,17 @@
+export function toSnakeCaseKey(key: string): string {
+  return key
+    .replace(/([A-Z]+)([A-Z][a-z])/g, "$1_$2")
+    .replace(/([a-z0-9])([A-Z])/g, "$1_$2")
+    .toLowerCase();
+}
+
+export function readSnakeCaseParamRaw(params: Record<string, unknown>, key: string): unknown {
+  if (Object.hasOwn(params, key)) {
+    return params[key];
+  }
+  const snakeKey = toSnakeCaseKey(key);
+  if (snakeKey !== key && Object.hasOwn(params, snakeKey)) {
+    return params[snakeKey];
+  }
+  return undefined;
+}
diff --git a/src/poll-params.ts b/src/poll-params.ts
index 88dc6336d32..f6fc5546548 100644
--- a/src/poll-params.ts
+++ b/src/poll-params.ts
@@ -1,3 +1,5 @@
+import { readSnakeCaseParamRaw } from "./param-key.js";
+
 export type PollCreationParamKind = "string" | "stringArray" | "number" | "boolean";
 
 export type PollCreationParamDef = {
@@ -19,22 +21,8 @@ export type PollCreationParamName = keyof typeof POLL_CREATION_PARAM_DEFS;
 
 export const POLL_CREATION_PARAM_NAMES = Object.keys(POLL_CREATION_PARAM_DEFS);
 
-function toSnakeCaseKey(key: string): string {
-  return key
-    .replace(/([A-Z]+)([A-Z][a-z])/g, "$1_$2")
-    .replace(/([a-z0-9])([A-Z])/g, "$1_$2")
-    .toLowerCase();
-}
-
 function readPollParamRaw(params: Record<string, unknown>, key: string): unknown {
-  if (Object.hasOwn(params, key)) {
-    return params[key];
-  }
-  const snakeKey = toSnakeCaseKey(key);
-  if (snakeKey !== key && Object.hasOwn(params, snakeKey)) {
-    return params[snakeKey];
-  }
-  return undefined;
+  return readSnakeCaseParamRaw(params, key);
 }
 
 export function resolveTelegramPollVisibility(params: {