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Is the README example Tool registration method incorrect? #128
Description
Describe the bug
Is the README example Tool registration method incorrect?
Using the example from the README, I get an error saying that the inputSchema is expected to be an object.
Example from the README:
Tool(
name: "weather",
description: "Get current weather for a location",
inputSchema: .object([
"location": .string("City name or coordinates"),
"units": .string("Units of measurement, e.g., metric, imperial")
])
)When I try this format, I get the expected response:
Tool(
name: "weather",
description: "Get current weather for a location",
inputSchema: .object([
"type": "object",
"properties": [
"a": ["type": "number"],
"b": ["type": "number"]
],
"required": ["a", "b"]
])
)To Reproduce
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1.
Expected behavior
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Activity
richard-giantrobot commentedon Jun 5, 2025
I was getting the same error, thanks to your code snippet it started working. Thank you @Kila2, how did you figure it out?
Kila2 commentedon Jun 5, 2025
I found that the input mode for MCP servers to send messages to clients is "{}", but the MCP protocol requires a "type" field, that's all
ptliddle commentedon Jun 14, 2025
No, see #131 (comment) for more context. It currently isn't producing valid JSON Schema output.
samkudr commentedon Sep 9, 2025
Yes, it misses
inputSchema.typeproperty. If #161 would be approved, at least partially, it will fix the issue.