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Pirsch Analytics MCP by usefulapi

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Get growth rates

pirsch_get_growth
Read-only

Growth of visitors, views, sessions, bounces, time spent and conversion rate compared with the previous period of the same length. GET /api/v1/statistics/growth.

Input Schema

NameRequiredDescriptionDefault
osNoOperating system. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
toYesLast day, yyyy-mm-dd, whole day included.
tzNoIANA time zone such as Europe/Berlin. Default: the dashboard's time zone.
tagNoTag key to filter for.
cityNoCity name. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
fromYesFirst day, yyyy-mm-dd (in the dashboard time zone unless tz is set).
pathNoPage path, for example /pricing. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
tagsNoTag key/value pairs; only results with all pairs match.
eventNoEvent name. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
browserNoBrowser. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
channelNoTraffic channel such as "Paid Search" or "Organic Search". Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
countryNoISO 3166 alpha-2 country code such as jp. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
patternNoRegular expression that filters and groups pages, for example (?i)^/blog/[^/]+$.
hostnameNoHostname (useful for rollup views). Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
languageNoISO 639-1 language code such as en. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
platformNoPlatform.
referrerNoReferrer, usually a URL. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
utm_termNoUTM term. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
domain_idYesPirsch domain (dashboard) id. Get it from pirsch_list_domains.
exit_pathNoExit page path. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
entry_pathNoEntry page path. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
event_metaNoEvent metadata key/value pairs; only events with all pairs match.
utm_mediumNoUTM medium. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
utm_sourceNoUTM source. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
utm_contentNoUTM content. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
screen_classNoScreen class XXL, XL, L, M or S. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
utm_campaignNoUTM campaign. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).
referrer_nameNoReferrer name, usually the hostname. Optional filter. A value may start with ! (is not), ~ (contains) or ^ (does not contain).

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

A3.6/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already cover the safety profile (readOnlyHint=true, destructiveHint=false, openWorldHint=true), so the bar is lower. The description still adds genuinely useful behavior: it enumerates the six returned metrics and discloses that values are relative to the preceding period of equal length — semantics an agent cannot infer from the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two short sentences, front-loaded with the metric list and comparison semantics. The trailing 'GET /api/v1/statistics/growth.' is filler for an agent that calls the tool rather than the HTTP API, but it costs little.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With 28 parameters but full schema coverage, the main gap is the absent output schema — the description names the metrics returned but does not say whether growth is expressed as a percentage, ratio or delta, nor whether per-metric values are signed. Adequate but not complete for a comparison tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% across all 28 parameters, so the schema fully documents filters, date formats, tz handling and the domain_id source. The description adds nothing parameter-specific, which is the correct baseline-3 case when the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource (growth of visitors, views, sessions, bounces, time spent, conversion rate) plus the comparison basis (previous period of the same length) and the backing endpoint. An agent can distinguish it from absolute-value siblings like pirsch_get_totals, but the description never names those siblings explicitly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is only implied: 'compared with the previous period of the same length' tells the agent this is the deltas tool, not the raw-totals tool. There is no explicit when-to-use / when-not-to-use statement and no mention of pirsch_get_totals as the alternative for absolute numbers.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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