diff --git a/packages/loopover-miner/lib/deny-check.js b/packages/loopover-miner/lib/deny-check.js
index dda33c14cb..d8bd347d10 100644
--- a/packages/loopover-miner/lib/deny-check.js
+++ b/packages/loopover-miner/lib/deny-check.js
@@ -34,12 +34,14 @@ export function parseDenyCheckArgs(args) {
     }
     if (token === "--tool" || token === "--name") {
       const tool = args[++index];
-      if (!tool) return { error: "Missing value for --tool." };
+      if (!tool || tool.startsWith("-")) return { error: "Missing value for --tool." };
       options.tool = tool;
       continue;
     }
     if (token === "--input") {
-      const parsed = parseToolInput(args[++index]);
+      const raw = args[++index];
+      if (!raw || raw.startsWith("-")) return { error: "Missing value for --input." };
+      const parsed = parseToolInput(raw);
       if ("error" in parsed) return { error: parsed.error };
       options.input = parsed.value;
       continue;
diff --git a/test/unit/miner-cli-deny-check.test.ts b/test/unit/miner-cli-deny-check.test.ts
index 9a09e1c36c..5c5543e2ab 100644
--- a/test/unit/miner-cli-deny-check.test.ts
+++ b/test/unit/miner-cli-deny-check.test.ts
@@ -27,6 +27,18 @@ describe("loopover-miner hooks check command", () => {
     });
   });
 
+  it("parseDenyCheckArgs rejects a flag consumed as another flag's value (#5833)", () => {
+    // --tool/--input must not swallow an adjacent flag as their value; each reports the specific
+    // "Missing value" error rather than falling through to the generic usage string.
+    expect(parseDenyCheckArgs(["--tool"])).toEqual({ error: "Missing value for --tool." });
+    expect(parseDenyCheckArgs(["--tool", "--input", "{}"])).toEqual({ error: "Missing value for --tool." });
+    expect(parseDenyCheckArgs(["--name", "--json"])).toEqual({ error: "Missing value for --tool." });
+    expect(parseDenyCheckArgs(["--tool", "Write", "--input"])).toEqual({ error: "Missing value for --input." });
+    expect(parseDenyCheckArgs(["--tool", "Write", "--input", "--json"])).toEqual({
+      error: "Missing value for --input.",
+    });
+  });
+
   it("runDenyCheck exits 1 when a built-in rule blocks the call", () => {
     const error = vi.spyOn(console, "error").mockImplementation(() => undefined);
     expect(