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This section details on the original issue you should resolve

<issue_title>perf: integrate go-sdk SchemaProvider interface (Phase 2)</issue_title>
<issue_description>## Summary

Integrate the SchemaProvider interface optimization from the go-sdk fork to enable zero-reflection schema generation for performance-critical tools.

Background

Building on Phase 1 (schema caching), this phase adds an opt-inSchemaProvider interface that allows types to provide pre-computed schemas, completely avoiding runtime reflection.

Implementation

1. Update go.mod to use the fork

Add a replace directive to use the optimized fork:

replacegithub.com/modelcontextprotocol/go-sdk=>github.com/SamMorrowDrums/go-sdkv0.0.0-20251204133000-f66cde0xxxxx

Or use the branch reference:

replacegithub.com/modelcontextprotocol/go-sdk=>github.com/SamMorrowDrums/go-sdkperf/phase2-schema-provider

2. Run go mod tidy

go mod tidy

3. (Optional) Implement SchemaProvider for high-traffic tools

For tools that are called frequently, implement theSchemaProvider interface:

import"github.com/google/jsonschema-go/jsonschema"typeSearchRepositoriesInputstruct {Querystring`json:"query"`// ...}varsearchReposSchema=&jsonschema.Schema{Type:"object",Properties:map[string]*jsonschema.Schema{"query": {Type:"string",Description:"Search query"},    },Required: []string{"query"},}varsearchReposResolved,_=searchReposSchema.Resolve(nil)func (SearchRepositoriesInput)MCPSchema()*jsonschema.Schema {returnsearchReposSchema}func (SearchRepositoriesInput)MCPResolvedSchema()*jsonschema.Resolved {returnsearchReposResolved}

4. Verify all tests pass

gotest ./...

Expected Impact

• Without code changes: Automatic benefit from Phase 1 caching
• With SchemaProvider: Zero reflection overhead for implemented types

Fork Branch

• Repository:https://github.com/SamMorrowDrums/go-sdk
• Branch:perf/phase2-schema-provider
• PR:feat: add SchemaProvider interface for zero-reflection schemas SamMorrowDrums/go-sdk#2

Dependencies

This builds on Phase 1:#1530</issue_description>

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