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MCP Servers Use 38,900 Tokens for Tool Definitions Before User Input

By PulseAugur Editorial · [1 sources] ·

A technical analysis of MCP servers revealed that they consume a significant portion of their context window on tool definitions before processing user input. Specifically, nine servers were observed to use 38,900 tokens for tool definitions, which amounts to 19.4% of a 200,000 token window. A notable finding was that a single server accounted for 45% of this token usage. AI

IMPACT This analysis highlights potential inefficiencies in how AI systems manage context, which could impact operational costs and performance.

RANK_REASON Analysis of technical performance metrics for a specific server type. [lever_c_demoted from research: ic=1 ai=0.7]

Read on Medium — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

MCP Servers Use 38,900 Tokens for Tool Definitions Before User Input

How we ranked this

Signal score
29 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
Analysis of technical performance metrics for a specific server type. [lever_c_demoted from research: ic=1 ai=0.7]
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
infra
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. Medium — MCP tag TIER_1 English(EN) · Decoding AI by Nueravi ·

    How Much Context Do MCP Servers Actually Cost? We Measured 38,900 Tokens

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://medium.com/@decoding_ai_by_nureravi/how-much-context-do-mcp-servers-actually-cost-we-measured-38-900-tokens-bd6187ca140d?source=rss------mcp-5"><img src="https://cdn-images-1.medium.com/max/2400/1*g3lpbHO…

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