diff --git a/.changeset/fix-blocked-reason-not-returned.md b/.changeset/fix-blocked-reason-not-returned.md
new file mode 100644
index 0000000..9e547ec
--- /dev/null
+++ b/.changeset/fix-blocked-reason-not-returned.md
@@ -0,0 +1,20 @@
+---
+"@senderkit/sdk": patch
+---
+
+Correct the `blocked` message documentation to match the API.
+
+The previous release advertised a `Message.blockedReason` field carrying the
+"human-readable trigger" for a blocked send. senderkit-app never returned it:
+the REST `messages.list` / `messages.get` projection (and the MCP tools built
+on it) deliberately omit the abuse detection breakdown, which is operator-only.
+The app has now codified this (the customer-facing `timeline` carries only a
+generic "Blocked by automated content safety checks." entry; the detailed
+reason stays in the operator-only admin abuse review).
+
+- Remove the never-populated `Message.blockedReason` field. Reads still expose
+  any extra server fields through the existing index signature, so this only
+  drops a misleading type/doc — no field that the API actually sent.
+- Update the `Message.status` and `MESSAGE_STATUSES` docs to stop pointing at
+  `blockedReason` and describe the generic, customer-facing block reason
+  instead.
diff --git a/packages/sdk/src/mcp-schemas.ts b/packages/sdk/src/mcp-schemas.ts
index 0dec5e3..82f93ac 100644
--- a/packages/sdk/src/mcp-schemas.ts
+++ b/packages/sdk/src/mcp-schemas.ts
@@ -122,7 +122,8 @@ const emailEnvelope = {
  * The ten message lifecycle statuses (mirrors the app's `messageStatusEnum`).
  * Bounces normalize to `failed` with the reason on the message timeline.
  * `blocked` is a terminal state set when the outbound abuse scanner halts a
- * send (the human-readable trigger is on the message's `blockedReason`).
+ * send. The detailed detection breakdown is operator-only and never returned by
+ * the API; a blocked message's `timeline` carries only a generic block entry.
  */
 export const MESSAGE_STATUSES = [
   "scheduled",
diff --git a/packages/sdk/src/types.ts b/packages/sdk/src/types.ts
index a3345e7..ddfb1de 100644
--- a/packages/sdk/src/types.ts
+++ b/packages/sdk/src/types.ts
@@ -195,15 +195,16 @@ export interface Message {
   publicId: string;
   /**
    * Lifecycle status (one of `MESSAGE_STATUSES`). A `blocked` message was
-   * halted by the outbound abuse scanner; `blockedReason` carries the trigger.
+   * halted by the outbound abuse scanner. The detailed detection breakdown is
+   * operator-only and is never returned by the API; the customer-facing
+   * `timeline` carries only a generic block entry ("Blocked by automated
+   * content safety checks.").
    */
   status: string;
   channel: Channel;
   templateSlug: string | null;
   recipient: string;
   createdAt: string;
-  /** Human-readable reason a `blocked` message was halted. Absent otherwise. */
-  blockedReason?: string | null;
   [key: string]: unknown;
 }