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    <title>ToolPulse Blog</title>
    <link>https://toolpulse.pages.dev/blog</link>
    <description>Comparison guides, technical deep-dives, and real failure case studies from monitoring AI agent tools.</description>
    <language>en-us</language>
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      <title><![CDATA[ToolPulse vs Langfuse: when to pick which]]></title>
      <link>https://toolpulse.pages.dev/blog/toolpulse-vs-langfuse-when-to-pick-which</link>
      <guid>https://toolpulse.pages.dev/blog/toolpulse-vs-langfuse-when-to-pick-which</guid>
      <pubDate>Mon, 27 Apr 2026 00:00:00 GMT</pubDate>
      <description><![CDATA[Honest, side-by-side comparison: Langfuse for prompt traces and evals, ToolPulse for tool-call reliability and schema drift. Where they overlap, where they don't, which to choose.]]></description>
      <category>comparison</category>
    </item>
    <item>
      <title><![CDATA[Why schema drift is the silent killer of agent reliability]]></title>
      <link>https://toolpulse.pages.dev/blog/why-schema-drift-is-the-silent-killer-of-agent-reliability</link>
      <guid>https://toolpulse.pages.dev/blog/why-schema-drift-is-the-silent-killer-of-agent-reliability</guid>
      <pubDate>Sun, 26 Apr 2026 00:00:00 GMT</pubDate>
      <description><![CDATA[An API changes a field from int to string. Your agent doesn't crash — it just silently makes worse decisions. Here's how schema drift propagates through tool chains, and how to detect it before users see the consequences.]]></description>
      <category>deep-dive</category>
    </item>
    <item>
      <title><![CDATA[The 3am drift event: how a popular search API quietly changed shape and what we caught]]></title>
      <link>https://toolpulse.pages.dev/blog/the-3am-drift-event-tool-x-quietly-changed-shape</link>
      <guid>https://toolpulse.pages.dev/blog/the-3am-drift-event-tool-x-quietly-changed-shape</guid>
      <pubDate>Sat, 25 Apr 2026 00:00:00 GMT</pubDate>
      <description><![CDATA[A real drift event from our own monitored agent stack. A search tool added a new top-level field, removed an inner one, and our agent started giving worse answers — for two hours, until the alert fired.]]></description>
      <category>case-study</category>
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