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Opportunity: TTL for list results (SEP-2549) #490

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Opportunity: TTL for list results (SEP-2549)#490
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area: mcp-protocolMCP protocol implementationenhancementNew feature or requestperformancePerformance improvementspriority: lowLow priority, nice-to-have
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v1.4 - MCP SDK 2.0 Alignment

Description

@jongalloway
jongalloway
opened on Jun 30, 2026

Opportunity: TTL for list results (SEP-2549)

Part of #481.

SDK 2.0 adds optional TimeToLive (TimeSpan?) and CacheScope to tools/list, prompts/list, resources/list, and server/discover results via ICacheableResult. This pairs naturally with the existing caching infrastructure (Caching/CachedResourceManager.cs, CacheMetrics.cs) to reduce client round-trips.

Tasks

  • Evaluate emitting TimeToLive/CacheScope on list results, sourcing TTLs from the existing cache configuration.
  • Ensure values are only emitted under 2026-07-28 (no effect on legacy clients).
  • Add/adjust tests for the new fields.

Acceptance

  • List results expose cache hints aligned with the server's caching layer.

Activity

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    area: mcp-protocolMCP protocol implementationenhancementNew feature or requestperformancePerformance improvementspriority: lowLow priority, nice-to-have

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