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Test Info: Warnings
- This test has a WPT meta file that expects 2 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /webmcp/imperative/executeTool-invalid-dictionary.https.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>WebMCP: executeTool argument validation checks</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<script>
promise_test(async t => {
await document.modelContext.registerTool({
name: "legit_tool",
description: "Legitimate tool description",
execute: async (args) => "success"
});
const tools = await document.modelContext.getTools();
const legit = tools.find(t => t.name === "legit_tool");
assert_true(!!legit, "Legitimate tool must be successfully discovered");
// A plain object that mirrors every attribute of a real `Tool` is still not
// a `Tool`, so it must not be accepted.
const lookalike = {
name: legit.name,
description: legit.description,
title: legit.title,
window: legit.window,
origin: legit.origin,
};
await promise_rejects_js(
t,
TypeError,
document.modelContext.executeTool(lookalike),
"executeTool() must reject with TypeError for an object that is not a Tool"
);
}, "executeTool() rejects with TypeError when passed an object that is not a Tool");
promise_test(async t => {
await document.modelContext.registerTool({
name: "json-test-tool",
description: "Tool for JSON tests",
execute: async (args) => "success"
});
const tools = await document.modelContext.getTools();
const tool = tools.find(t => t.name === "json-test-tool");
assert_true(!!tool, "Legitimate tool must be successfully discovered");
const circularObject = {};
circularObject.self = circularObject;
await promise_rejects_js(
t,
TypeError,
document.modelContext.executeTool(tool, circularObject),
"executeTool() must reject with TypeError for circular JSON input"
);
const undefinedToJSON = {
toJSON: () => undefined
};
await promise_rejects_js(
t,
TypeError,
document.modelContext.executeTool(tool, undefinedToJSON),
"executeTool() must reject with TypeError when toJSON returns undefined"
);
await promise_rejects_js(
t,
TypeError,
document.modelContext.executeTool(tool, BigInt(42)),
"executeTool() must reject with TypeError for non-serializable types JSON input"
);
}, "executeTool() rejects with TypeError for invalid JSON arguments");
</script>
</body>
</html>