Glossary
Tool calling
Letting a model invoke defined functions with structured arguments, so it can act rather than only describe.
- Also called
- function calling
You describe available tools with a schema; the model chooses one and supplies arguments; your code executes it and returns the result.
Description quality determines accuracy. A vague tool description produces confidently wrong calls, and that is an authoring problem rather than a model problem.
Tool design is also a security boundary. Every tool you expose is a capability the model can invoke on a user's behalf, so the right default is read-only, narrowly scoped, and expanded deliberately once you have watched how it is actually used. A single over-broad tool undoes careful work everywhere else in the system.
Related terms, in context
The concepts you almost always meet alongside tool calling.
- AI agent
- A system that plans a sequence of steps, calls tools, and changes state in real systems, rather than only producing text.
- Model Context Protocol
- An open standard for exposing tools and data to AI assistants consistently across clients.
- Structured output
- Constraining a model to return data matching a schema, so downstream code can rely on it.
Where this shows up in our work
Tool calling is not an abstraction for us. It is a decision we make on live projects. It shows up most directly in ai agent development, mcp server development, where getting it wrong has a cost someone can measure.
If you are evaluating a vendor on this, the useful question is not whether they can define the term. It is what they measure, what they would refuse to do, and what happens in their system when the assumption behind tool calling stops holding.
Questions
What is Tool calling?
Letting a model invoke defined functions with structured arguments, so it can act rather than only describe.
Does Orqent Labs build this?
Yes, AI Agent Development and MCP Server Development. We work across India, covering all 19,238 PIN codes remotely.
Building something that involves tool calling?
We will tell you honestly whether it is the right approach for your problem.
Or email bd@dtrasglobal.com · call +91 74118 77878