Tool Fusion (mcp-fusion)

[chughtapan]

Instead of including many individual tools with similar schemas in the prompt, fusion creates a "grouped" tool which uses a discriminator field to specify the "opcode" and annotates what parameters are needed for each op.

References:

• mcp-fusion — Reference implementation of this technique in Typescript.

[scottslewis]

The description provided above for mcp-fusion is not clear at all.

Here is an introductory snippet from from mcp-fusion Model, View, Agent (MVA) docs.

Model-View-Agent (MVA) replaces the human-centric View of MVC with a Presenter — a deterministic perception layer that tells the agent how to interpret, display, and act on domain data. For the full reference, see the MVA Architecture Section.Model-View-Agent (MVA) replaces the human-centric View of MVC with a Presenter — a deterministic perception layer that tells the agent how to interpret, display, and act on domain data.

mcp-fusion's MVA architecture is based upon/implemented by this typescript impl of server-side grouping extension.

This same Group schema is used for the Java SDK extension, and the Python SDK extension, allowing servers and clients that use these extensions to interoperate.