// MCP TOKEN COST

The DataBR MCP server costs 5,528 tokens before the first call.

Connect DataBR and its 82 tool definitions are loaded into the model's context on every request — 2.8% of a 200k window spent before your agent does anything.

QUICK ANSWER The DataBR MCP server's tool definitions consume 5,528 tokens — 2.9× the median MCP server (1,905 tokens). A scoped grant exposing only the tools you use cuts that roughly in proportion.

MEASURED FROM SCHEMAS 82 tools · 5,528 tokens · 2.8% of 200k · 0.6% of 1M Method →

// CONTEXT WINDOW SHARE

What that buys before your agent starts working.

Tool definitions are overhead: they occupy context on every request and compete with your code, documents and conversation history for the same window.

200K WINDOW 2.8%

1M WINDOW 0.6%

Corpus context: DataBR ranks #989 of 3,213 measured MCP servers by definition cost. The median is 1,905 tokens, p90 is 7,952, and the heaviest (Fusionauth) is 183,337 — 92% of a 200k window on its own.

// PER-TOOL BREAKDOWN

Where the 5,528 tokens go.

Each row is one tool definition as a tools/list entry — name, description and input schema — counted with o200k_base. Average: 67 tokens per tool.

Tool	Category	Tokens	% of server
consultar_estabelecimento_saude	Read	151	2.7%
consultar_contas_publicas	Read	129	2.3%
consultar_tributos_ncm	Read	128	2.3%
consultar_icms	Read	120	2.2%
consultar_indicador_bcb	Read	114	2.1%
consultar_indicadores_ibge	Read	112	2.0%
consultar_ipea	Read	112	2.0%
consultar_municipio	Read	98	1.8%
consultar_fundo_investimento	Read	96	1.7%
consultar_orcamento	Read	90	1.6%
analise_setor	Read	89	1.6%
consultar_mortalidade	Read	89	1.6%
buscar_diario_oficial	Read	86	1.6%
consultar_deputados	Read	86	1.6%
consultar_desmatamento	Read	86	1.6%
consultar_vacinacao	Read	84	1.5%
consultar_dengue	Read	82	1.5%
consultar_nascimentos	Read	82	1.5%
consultar_hospitais	Read	81	1.5%
consultar_transparencia	Read	81	1.5%
consultar_acidentes_transito	Read	80	1.4%
consultar_senadores	Read	80	1.4%
consultar_processo_judicial	Read	78	1.4%
consultar_credito_bcb	Read	77	1.4%
consultar_emprego	Read	77	1.4%
buscar_diarios_por_tema	Read	75	1.4%
consultar_partidos	Read	75	1.4%
cotacao_cambio	Read	74	1.3%
consultar_beneficios_sociais	Read	73	1.3%
consultar_jurisprudencia	Read	73	1.3%
consultar_orcamento_funcional	Read	73	1.3%
consultar_proposicoes	Read	72	1.3%
consultar_empresa	Read	71	1.3%
consultar_financiamento_eleitoral	Read	71	1.3%
consultar_aeronave	Read	69	1.2%
consultar_candidatos	Read	69	1.2%
consultar_comercio_exterior	Read	69	1.2%
verificar_compliance	Read	69	1.2%
consultar_servidores_federais	Read	68	1.2%
consultar_tarifas_energia	Read	68	1.2%
cotacao_acoes	Read	67	1.2%
consultar_fatos_relevantes	Read	66	1.2%
consultar_cnae	Read	64	1.2%
consultar_diarios_municipais	Read	64	1.2%
analise_mercado_trabalho	Read	62	1.1%
buscar_processos_judiciais	Read	62	1.1%
consultar_geografia_brasil	Read	62	1.1%
consultar_tcu_certidao	Read	59	1.1%
consultar_transportador	Read	59	1.1%
buscar_licitacao	Read	57	1.0%
perfil_municipio	Read	57	1.0%
consultar_endereco	Read	56	1.0%
analise_litigio	Read	54	1.0%
rede_influencia	Read	54	1.0%
risco_ambiental	Read	54	1.0%
analise_competicao	Read	53	1.0%
credito_score	Read	53	1.0%
descobrir_casos_uso	Read	53	1.0%
consultar_contratos_federais	Read	52	0.9%
consultar_medicamento	Read	50	0.9%
due_diligence_empresa	Read	50	0.9%
indicadores_macro	Read	49	0.9%
analise_esg	Read	48	0.9%
perfil_completo_empresa	Read	48	0.9%
consultar_tcu_acordaos	Read	47	0.9%
consultar_focus	Read	45	0.8%
panorama_economico	Read	43	0.8%
consultar_censo_escolar	Read	42	0.8%
consultar_combustiveis	Read	42	0.8%
consultar_pix_estatisticas	Read	42	0.8%
consultar_titulos_tesouro	Read	42	0.8%
consultar_embargos_ambientais	Read	40	0.7%
consultar_ibovespa	Read	40	0.7%
consultar_populacao	Read	40	0.7%
consultar_reservas_internacionais	Read	39	0.7%
consultar_tcu_inabilitados	Read	39	0.7%
consultar_uso_solo	Read	39	0.7%
consultar_selic	Read	38	0.7%
consultar_planos_saude	Read	36	0.7%
listar_municipios_diarios	Read	36	0.7%
consultar_votacoes	Read	34	0.6%
listar_temas_diarios	Read	34	0.6%

// SCOPED GRANT

Most agents use a handful of these tools. They pay for all 82.

A PolicyLayer grant exposes only the tools you allow — ungranted definitions are filtered out of the tool list, so they never enter the context window. Estimates below assume typical-weight tools (67 tokens each).

Grant scope	Definition cost	Reduction
All 82 tools (no gateway)	5,528 tokens	—
3 granted tools	~202 tokens	−96%
5 granted tools	~337 tokens	−94%
10 granted tools	~674 tokens	−88%

Model your own stack in the token-cost calculator, or see the DataBR policy for what a sensible grant looks like.

//FAQ

DataBR token-cost questions.

How many tokens does the DataBR MCP server use?+

Its 82 tool definitions total 5,528 tokens — 2.8% of a 200k context window — measured with tiktoken o200k_base over the serialised tools/list payload. Exact counts vary slightly by client and model.

Why does DataBR consume tokens before I send a message?+

MCP clients load every connected server's tool definitions — name, description, and input schema — into the model's context so it knows what it can call. That payload is charged against your context window on every request, whether or not a tool is used.

How do I reduce DataBR's token usage?+

Expose fewer tools. A PolicyLayer grant scopes DataBR to only the tools you allow — ungranted definitions are filtered out of the tool list, so they never enter the context window. A grant of 3 typical tools costs roughly 202 tokens, a 96% reduction.

Does deferred tool loading fix this?+

Partially, in some clients. Claude Code defers MCP tool schemas behind a tool-search step by default, and VS Code has experimental grouping — but you still pay tokens per search and reload, and Cursor, Windsurf and Gemini CLI load definitions upfront. Reducing the exposed tool set cuts the cost in every client.

// METHOD & REVIEW

How these numbers were measured.

Serialisation

Each tool is serialised as a tools/list entry — name, description, input schema — from the schemas in the PolicyLayer scan database. Clients differ slightly in framing, so treat counts as close estimates.

Tokeniser

tiktoken o200k_base (GPT-4o/o-series). Anthropic's current tokeniser isn't published, so Claude's exact counts will differ; for English text and JSON schemas the totals are close enough to treat these as estimates.

Deferred loading

Some clients now defer schema loading (Claude Code's tool search; VS Code experimental grouping). You still pay per search and reload — and Cursor, Windsurf and Gemini CLI load everything upfront.

Computed 07-06-2026 from the PolicyLayer scan database over all 82 catalogued DataBR tools. Counts refresh with every site build.

Expose only the tools you use — the rest never enter your context.

A PolicyLayer grant scopes DataBR to the tools you actually allow. Ungranted definitions never load, and every call that does run is checked against policy first.

SCOPE YOUR GRANT →

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