Unverified50% confidenceFactExact time
A tool contract is an explicit agreement between the agent and the tool regarding the invocation method, input parameters, output format, and error semantics, usually provided to the model in the form of a structured description (such as JSON Schema).
1
Sources
50%
Confidence
Long-term
Relevance
10/23/2026
First Seen
Sources
AgentCore in Practice: Connecting Custom Tools and MCP Servers to Agents
redditr/deeplearning10/23/2026
Related Entities
Related Claims
UnverifiedSkills are not mutually exclusive with traditional tool calling (Tool Use / Function Calling): tool calling has inputs and outputs strictly constrained by API schemas, whereas Skills are more like an operation manual plus a resource bundle, using natural language to guide multi-step workflows.70% similarVerifiedThe underlying mechanism of Tool Use is that developers pre-define the name, description, and parameter structure (Schema) of tools, and the model determines during inference when and which tool to call and outputs structured invocation instructions.70% similarUnverifiedThe tool description (Tool Schema) determines whether the LLM can select the tool in the correct scenario and correctly fill in the parameters, and is a key engineering detail for the stable operation of the Agent.70% similarVerifiedThe Tool Routing mechanism selects tools by performing similarity matching between the semantic representation of user intent and the embedding vectors of tool descriptions, so the quality of a tool's natural language description directly affects the agent's decision-making accuracy.70% similarVerifiedTool Use / Function Calling is a core mechanism in AI agent architecture, through which the model issues structured instructions to external systems via tool calling interfaces.69% similar
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